1w051 A Set Volume 1 Edit Code 05
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The driving mechanism that is mainly responsible for the earth’s large-scale atmospheric circulations is the
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Unequal heating of the earth.
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Rotation of the earth.
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Hadley cell.
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Polar cell.
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CDC 1W051A VOLUME 1:
General Meteorology and Surface Weather Observations
1W051A 01 1107, Edit Code 05
AFSC 1W051
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- 2.
How do you report prevailing visibility at US stations and overseas stations?
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Meters for both.
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Statute miles for both.
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Statute miles for US stations and meters for overseas stations.
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Meters for US stations and statute miles for overseas stations.
Correct Answer
A. Statute miles for US stations and meters for overseas stations.Explanation
The prevailing visibility at US stations is reported in statute miles, while at overseas stations it is reported in meters. This is because the US uses the imperial system of measurement, which includes statute miles, while many other countries use the metric system, which includes meters. Therefore, the visibility measurements are reported in the appropriate units for each location.Rate this question:
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- 3.
What air mass forms over land only during the summer?
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MTk.
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MPw.
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CPk.
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CT.
Correct Answer
A. CT.Explanation
The air mass that forms over land only during the summer is cT. This is because cT refers to a continental tropical air mass, which is characterized by warm and dry air. During the summer, the land heats up more quickly than the ocean, leading to the formation of this air mass. It is typically found in regions with hot and arid climates, such as deserts.Rate this question:
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- 4.
In regards to types of pressure systems, a heat low is a
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Cold barotropic low that forms during the winter.
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Cold barotropic low that forms during the summer.
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Warm barotropic low that forms during the winter.
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Warm barotropic low that forms during the summer.
Correct Answer
A. Warm barotropic low that forms during the summer.Explanation
A heat low is a warm barotropic low that forms during the summer. This means that it is a low-pressure system that is characterized by warm air and uniform temperature distribution throughout its vertical extent. Heat lows typically form over land areas during the summer months when intense heating from the sun causes the air to expand and rise, creating a region of low pressure.Rate this question:
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- 5.
The distinguishing feature of any tornadic activity is
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Intense thunderstorm activity.
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Wind gusts over 35 knots in speed.
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Cumulonimbus mammatus clouds.
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The funnel-shaped appendage that hangs from the base of the cloud.
Correct Answer
A. The funnel-shaped appendage that hangs from the base of the cloud.Explanation
The distinguishing feature of any tornadic activity is the funnel-shaped appendage that hangs from the base of the cloud. This funnel-shaped appendage, also known as the tornado, is a rapidly rotating column of air that is in contact with both the surface of the Earth and a cumulonimbus cloud. It is this characteristic funnel shape that sets tornadic activity apart from other weather phenomena such as intense thunderstorm activity, wind gusts over 35 knots in speed, or cumulonimbus mammatus clouds.Rate this question:
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- 6.
Above 13 miles, the radiation from the sun breaks down the oxygen in the atmosphere into
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Ozone gas.
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Argon gas.
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Carbon dioxide.
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Gaseous nitrogen.
Correct Answer
A. Ozone gas.Explanation
When the radiation from the sun reaches above 13 miles in the atmosphere, it has enough energy to break down the oxygen molecules (O2) into individual oxygen atoms (O). These oxygen atoms then combine with other oxygen molecules to form ozone (O3) gas. Therefore, the correct answer is ozone gas.Rate this question:
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- 7.
If you throw a ball towards a stationary target from the window of a speeding vehicle, coriolis force (CoF) will cause the ball to miss the target
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To the right.
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To the left.
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Downward.
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Upward.
Correct Answer
A. To the right.Explanation
The Coriolis force is a result of the rotation of the Earth and causes moving objects to be deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. In this scenario, as the ball is thrown from a speeding vehicle, it has both the forward velocity of the vehicle and the rotational velocity of the Earth. The Coriolis force acts perpendicular to the direction of motion, causing the ball to deviate to the right of its intended target. Therefore, the ball will miss the target to the right.Rate this question:
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- 8.
Where are the greatest velocities located in relation to the subtropical jet (SJT)?
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In the region of difluence of the STJ and polar front jet (PFJ).
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In the region of confluence of the STJ and PFJ.
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The STJ’s eastern most extension.
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The STJ’S western most extension.
Correct Answer
A. In the region of confluence of the STJ and PFJ.Explanation
The greatest velocities are located in the region of confluence of the subtropical jet (STJ) and polar front jet (PFJ). This means that the highest speeds are found where the STJ and PFJ merge together. The confluence of these two jets leads to a strengthening of the winds and an increase in velocity. Therefore, the region of confluence is where the greatest velocities are found in relation to the STJ.Rate this question:
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- 9.
“Jet fingers”
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Often develop more than 400 miles apart.
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Suggest that the jet stream is beginning to dissipate.
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Are somewhat rare and usually occur either singly or in pairs.
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Are formed during periods when the jet stream is well organized and the core exceeds 100kts.
Correct Answer
A. Suggest that the jet stream is beginning to dissipate.Explanation
The statement "Jet fingers often develop more than 400 miles apart" suggests that the jet stream is beginning to dissipate. When the jet stream weakens and starts to break apart, it can form separate "fingers" that are spaced far apart. This indicates a loss of the strong, continuous flow that characterizes a well-organized jet stream. Therefore, the occurrence of jet fingers at a significant distance from each other implies the dissipation of the jet stream.Rate this question:
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- 10.
An increase of mass in a column of air will cause the surface pressure to
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Increase.
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Decrease.
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Remain steady.
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Do nothing, pressure is not affected by mass.
Correct Answer
A. Increase.Explanation
An increase in mass in a column of air will cause the surface pressure to increase. This is because an increase in mass leads to a greater number of air molecules in the column, resulting in more collisions between the molecules and the surface. These collisions exert a force on the surface, which in turn increases the pressure. Therefore, as the mass of the column of air increases, so does the surface pressure.Rate this question:
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- 11.
A thunderstorm officially ends
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Ten minutes after the last occurrence of thunder, hail, or lightning.
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Immediately after the last occurrence of thunder, hail, or lightning.
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Fifteen minutes after the last occurrence of thunder, hail, or lightning.
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Twenty minutes after the last occurrence of thunder, hail, or lightning.
Correct Answer
A. Fifteen minutes after the last occurrence of thunder, hail, or lightning.Explanation
A thunderstorm officially ends fifteen minutes after the last occurrence of thunder, hail, or lightning. This means that even if there is no more thunder, hail, or lightning, the storm is still considered to be ongoing for an additional fifteen minutes. This allows for any lingering effects or potential dangers associated with the storm to dissipate before it is officially declared over.Rate this question:
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- 12.
Which force is described as any center-seeking force?
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Inertia.
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Coriolis.
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Centrifugal.
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Centripetal.
Correct Answer
A. Centripetal.Explanation
Centripetal force is described as any center-seeking force. This force acts towards the center of rotation and keeps an object moving in a circular path. Inertia is the tendency of an object to resist changes in its motion. Coriolis force is an apparent force that acts on moving objects in a rotating system. Centrifugal force is a perceived force that appears to push objects away from the center of rotation. Therefore, the correct answer is centripetal force, as it is the force that acts towards the center.Rate this question:
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- 13.
What air mass classification signifies a stable, continental polar air mass that is warmer than the surface it is moving over?
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CPks.
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CPws.
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CTws.
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CTku.
Correct Answer
A. CPws.Explanation
The air mass classification cPws signifies a stable, continental polar air mass that is warmer than the surface it is moving over. Continental polar air masses are formed over land and are characterized by their cool and dry nature. The "w" in cPws indicates that this air mass is warmer than the surface it is moving over, which creates a stable condition. This classification is commonly associated with clear and dry weather conditions.Rate this question:
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- 14.
It is winter. A cPk air mass is moving over the Great Lakes. In this situation, the southern shores of the Great Lakes will experience
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Hail.
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Heavy snow.
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Thunderstorms.
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Freezing precipitation.
Correct Answer
A. Heavy snow.Explanation
In winter, when a cPk air mass moves over the Great Lakes, it brings cold air and moisture from the lakes, causing heavy snowfall. The cold air mass interacts with the warmer lake waters, creating an unstable atmosphere that promotes the formation of snow clouds. As the air rises and cools, the moisture condenses and falls as snow. Therefore, the southern shores of the Great Lakes will experience heavy snow during this situation.Rate this question:
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- 15.
A low-pressure system undergoing cyclogenesis is said to be
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Divergence and surface low pressure.
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Forming or deepening.
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Dissipating or filling.
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Forming or filling.
Correct Answer
A. Forming or deepening.Explanation
When a low-pressure system undergoes cyclogenesis, it means that it is forming or deepening. Cyclogenesis refers to the process of a low-pressure system intensifying and developing into a stronger storm. This can occur when there is an increase in convergence of air at the surface, leading to the formation of a low-pressure center. As the system deepens, it becomes stronger and can potentially develop into a more severe weather event, such as a tropical storm or hurricane.Rate this question:
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- 16.
When the central pressure of an anticyclone is rising, you can infer the anticyclone is
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Filling.
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Building.
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Deepening.
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Weakening.
Correct Answer
A. Building.Explanation
When the central pressure of an anticyclone is rising, it indicates that the air within the anticyclone is becoming denser and sinking. This sinking air leads to the compression and building up of the anticyclone. Therefore, the correct answer is building.Rate this question:
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- 17.
Unstable waves are classified as
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Barotropic highs.
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Barotropic lows.
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Baroclinic high.
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Baroclinic lows.
Correct Answer
A. Baroclinic lows.Explanation
Unstable waves are classified as baroclinic lows. Baroclinic refers to the condition where there is a gradient of temperature or density in the atmosphere or ocean. Unstable waves in this context are characterized by the presence of such gradients, which can lead to the development of storms and other turbulent weather conditions. Barotropic highs and lows, on the other hand, do not have such gradients and are associated with more stable atmospheric conditions. Therefore, the correct answer is baroclinic lows.Rate this question:
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- 18.
What causes the surface low to deepen during the self-development process?
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Divergence aloft.
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Convergence aloft.
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Cold-air advection.
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Warm-air advection.
Correct Answer
A. Divergence aloft.Explanation
During the self-development process, the surface low deepens due to divergence aloft. Divergence aloft refers to the movement of air away from a certain point in the upper atmosphere. As air diverges, it creates a vacuum effect, causing air from lower levels to rise and fill the void. This vertical motion leads to the intensification of the surface low, as the rising air allows for the transport of more moisture and energy, further fueling the development of the low-pressure system.Rate this question:
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- 19.
To properly report the visibility for more than one sector, you would list the sectors in a
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Clockwise direction starting with the northernmost sector.
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Clockwise direction starting with the southernmost sector.
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Counterclockwise direction starting with the northernmost sector.
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Counterclockwise direction starting with the southernmost sector.
Correct Answer
A. Clockwise direction starting with the northernmost sector.Explanation
To properly report the visibility for more than one sector, it is important to list the sectors in a clockwise direction starting with the northernmost sector. This ensures consistency and clarity in reporting the visibility for each sector. By following a clockwise direction, it becomes easier to identify and track the visibility for each sector in a systematic manner. Starting with the northernmost sector helps to establish a reference point and provides a logical order for reporting the visibility in subsequent sectors.Rate this question:
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- 20.
For a runway visual range (RVR) report of R22/1000V1600FT, what is the visual range that a pilot can expect to see down the runway?
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1,000 feet.
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1,600 feet.
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1,300 feet.
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1,000 to 1,600 feet varying.
Correct Answer
A. 1,000 to 1,600 feet varying.Explanation
The RVR report of R22/1000V1600FT indicates that the visual range down the runway can vary between 1,000 and 1,600 feet. This means that the pilot can expect to see anywhere between 1,000 and 1,600 feet ahead while looking down the runway. The "R22" indicates the lowest value of 1,000 feet, and the "V1600FT" indicates that the visibility can vary up to 1,600 feet.Rate this question:
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- 21.
What type of precipitation might you observe with clear skies?
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Snow.
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Ice crystals.
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Ice pellets.
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Snow grains.
Correct Answer
A. Ice crystals.Explanation
Ice crystals can be observed with clear skies because they are formed when water vapor in the air freezes directly into ice without passing through a liquid phase. This process can occur even when the sky is clear and there are no visible clouds. Ice crystals can take the form of snowflakes, which are intricate and symmetrical structures, or they can appear as smaller ice particles suspended in the air. Therefore, observing ice crystals is possible even when there are clear skies.Rate this question:
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- 22.
For observing purposes, five hydrometers are considered to be obstructions to vision. They include mist, fog, blowing snow,
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Blowing spray, and blowing sand.
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Freezing fog, and blowing sand.
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Freezing fog, and blowing dust.
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Freezing fog, and blowing spray.
Correct Answer
A. Freezing fog, and blowing spray.Explanation
The correct answer is freezing fog, and blowing spray. These two weather conditions, freezing fog and blowing spray, can obstruct vision and make it difficult to see clearly. Freezing fog occurs when fog forms and the temperature drops below freezing, causing the fog to freeze and create icy conditions. Blowing spray refers to water droplets that are blown by strong winds, such as those near bodies of water or during storms. Both freezing fog and blowing spray can significantly reduce visibility and pose hazards to drivers and pilots.Rate this question:
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- 23.
How many degrees centigrade does the temperature decrease per 1,000 meters of altitude in the troposphere?
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3.5
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4.5
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5.5
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6.5
Correct Answer
A. 6.5Explanation
As altitude increases in the troposphere, the temperature decreases at a rate of 6.5 degrees centigrade per 1,000 meters. This is known as the lapse rate. The decrease in temperature with increasing altitude is due to the decrease in air pressure and the expansion of air molecules, which causes cooling. This lapse rate is an important factor in understanding weather patterns and atmospheric conditions in the troposphere.Rate this question:
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- 24.
What air mass classification signifies an unstable, maritime tropical air mass that is colder than the surface it is moving over?
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MTwu.
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MTws.
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MTku.
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MTks.
Correct Answer
A. MTku.Explanation
The air mass classification mTku signifies an unstable, maritime tropical air mass that is colder than the surface it is moving over. This means that the air mass is warm and moist, originating over tropical waters, but it is colder than the surface it is moving over. This can lead to instability in the atmosphere, potentially causing the formation of thunderstorms or other severe weather conditions.Rate this question:
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- 25.
The primary cause of surface pressure changes for a dynamic low is net
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Divergence aloft.
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Adiabatic cooling aloft.
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Adiabatic warming aloft.
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Divergence at the surface.
Correct Answer
A. Divergence aloft.Explanation
Divergence aloft is the primary cause of surface pressure changes for a dynamic low. Divergence refers to the movement of air away from a certain area. When there is divergence aloft, it means that air is moving away from the upper levels of the atmosphere. This leads to a decrease in air mass and lower atmospheric pressure at the surface. As a result, a dynamic low pressure system is formed. Adiabatic cooling and warming aloft do not directly cause surface pressure changes, while surface divergence is a result of the pressure changes rather than the cause.Rate this question:
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- 26.
What causes a surface high to build during the self-development process?
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Negative vorticity advection.
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Positive vorticity advection.
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Convergence aloft.
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Divergence aloft.
Correct Answer
A. Convergence aloft.Explanation
During the self-development process, a surface high builds due to convergence aloft. Convergence aloft refers to the horizontal movement of air towards a central point in the upper levels of the atmosphere. This convergence leads to the sinking of air and the development of high pressure at the surface. As the air sinks, it warms and becomes denser, creating a stable environment and inhibiting cloud formation. This results in clear skies and calm weather conditions associated with a surface high.Rate this question:
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- 27.
Which orographic cloud resembles an almond or a fish?
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Rotor.
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Lenticular.
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Foehn wall.
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Castellanus.
Correct Answer
A. Lenticular.Explanation
Lenticular clouds are formed when moist air flows over a mountain or hill and creates a series of stationary lens-shaped clouds. These clouds often have a smooth, rounded appearance and can resemble the shape of an almond or a fish. They are commonly seen near mountain ranges and are known for their unique and distinctive shape.Rate this question:
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- 28.
A change in wind direction of 45° (or more) that takes place in less than 15 minutes is called a
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Gust.
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Squall.
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Wind shift.
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Variable wind.
Correct Answer
A. Wind shift.Explanation
A change in wind direction of 45° or more that takes place in less than 15 minutes is called a wind shift. This term is used to describe a sudden change in the direction of the wind, which can occur due to various factors such as the movement of weather systems or the influence of local topography. Wind shifts can have significant impacts on weather conditions and can affect activities such as sailing, aviation, and forecasting.Rate this question:
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- 29.
The two atmospheric gases most responsible for the absorption of incoming solar radiation are
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Oxygen and ozone.
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Ozone and water vapor.
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Oxygen and water vapor.
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Ozone and carbon dioxide.
Correct Answer
A. Oxygen and ozone.Explanation
Oxygen and ozone are the two atmospheric gases most responsible for the absorption of incoming solar radiation. Oxygen absorbs ultraviolet (UV) radiation in the upper atmosphere, preventing it from reaching the Earth's surface. Ozone, which is a form of oxygen molecule (O3), absorbs UV radiation in the stratosphere, forming a protective layer that shields the Earth's surface from harmful UV rays. This absorption process helps to regulate the amount of solar radiation that reaches the Earth, playing a crucial role in maintaining the planet's temperature and supporting life.Rate this question:
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- 30.
Coriolis force (CoF) is created by
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The cyclonic rotation of the earth.
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The anticyclonic rotation of the earth.
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An opposing force to pressure gradient.
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An apparent force, and therefore, it does not exist.
Correct Answer
A. The cyclonic rotation of the earth.Explanation
The Coriolis force (CoF) is created by the cyclonic rotation of the earth. This force is a result of the earth's rotation and causes moving objects, such as air or water, to be deflected to the right in the northern hemisphere and to the left in the southern hemisphere. It is an important factor in the formation of weather patterns and ocean currents.Rate this question:
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- 31.
Advection transfers temperature
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By electromagnetic waves.
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Horizontally by the wind.
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Vertically by the wind.
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By molecular motion.
Correct Answer
A. Horizontally by the wind.Explanation
Advection refers to the horizontal movement of a property, such as temperature, by the wind. In this context, it means that temperature is transferred horizontally through the atmosphere by the movement of air masses. This is different from vertical transfer, which occurs through convection, and molecular motion, which refers to the random movement of molecules. The correct answer states that advection transfers temperature horizontally by the wind, indicating that the wind plays a crucial role in moving and distributing heat in the atmosphere.Rate this question:
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- 32.
What factors must a region possess in order to facilitate air mass formation?
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Uniform surface, stagnant air, and large-scale difluent flow.
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Must be over water, stagnant air, and large-scale difluent flow.
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Any nonuniform surface, stagnant air, and large-scale difluent flow.
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Must be over smooth land, stagnant air, and large-scale difluent flow.
Correct Answer
A. Uniform surface, stagnant air, and large-scale difluent flow.Explanation
A region must possess a uniform surface, stagnant air, and large-scale difluent flow in order to facilitate air mass formation. A uniform surface ensures that there are no significant variations in temperature or moisture content, which allows for the development of a stable air mass. Stagnant air means that there is little or no vertical movement of the air, which allows the air mass to remain intact and not mix with surrounding air. Large-scale difluent flow refers to the divergence of air at the upper levels of the atmosphere, which helps to maintain the stability and integrity of the air mass.Rate this question:
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- 33.
Which process is most responsible for the slow formation of air masses in the polar region?
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Loss of heat by radiation.
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Loss of heat by conduction.
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Transport of heat by turbulence.
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Transport of heat by evaporation and condensation.
Correct Answer
A. Loss of heat by radiation.Explanation
In the polar region, the slow formation of air masses is primarily due to the loss of heat by radiation. This process involves the transfer of heat energy from the Earth's surface to the atmosphere through the emission of infrared radiation. The polar region receives less sunlight and has colder temperatures, resulting in a slower rate of heat transfer. This gradual loss of heat leads to the formation of stable, cold air masses characteristic of polar regions.Rate this question:
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- 34.
The damper effect is comprised of upper-level
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Divergence and surface low pressure.
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Divergence and surface high pressure.
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Convergence and surface low pressure.
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Convergence and surface high pressure.
Correct Answer
A. Convergence and surface high pressure.Explanation
The correct answer is convergence and surface high pressure. In the context of the damper effect, convergence refers to the coming together of air masses at the surface, which leads to the formation of high pressure. High pressure systems are associated with clear skies and calm weather conditions. This explanation aligns with the given answer choice.Rate this question:
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- 35.
In the life cycle of a low, the system will evolve into a cold barotropic low in the
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Mature stage.
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Dissipation stage.
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Wave initiation stage.
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Wave intensification stage.
Correct Answer
A. Dissipation stage.Explanation
In the life cycle of a low, the system goes through different stages. The dissipation stage occurs when the low weakens and eventually dissipates. During this stage, the low loses its organized structure and the associated weather conditions gradually diminish. This stage is characterized by the dissipation of the low's energy and the gradual disappearance of its circulation. Therefore, the correct answer is the dissipation stage.Rate this question:
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- 36.
Which low cloud type and classification is identified by the presence of a cirriform anvil?
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Cumulus-L1.
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Cumulonimbus-L9.
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Cumulonimbus-L3.
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Towering cumulus-L2.
Correct Answer
A. Cumulonimbus-L9.Explanation
The correct answer is Cumulonimbus-L9. Cumulonimbus clouds are known for their anvil-shaped tops, which are formed when the cloud reaches the tropopause and spreads out in the shape of an anvil. The cirriform anvil refers to the thin, wispy appearance of the cloud top, which is characteristic of cirrus clouds. Therefore, the presence of a cirriform anvil indicates a Cumulonimbus cloud with a high classification of L9.Rate this question:
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- 37.
The best way to distinguish stratocumulus from altocumulus clouds is to use
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Movement.
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Appearance.
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The color of the elements.
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The size of the elements.
Correct Answer
A. The size of the elements.Explanation
The best way to distinguish stratocumulus from altocumulus clouds is by observing the size of the elements. Stratocumulus clouds have larger elements compared to altocumulus clouds. By examining the size of the cloud elements, one can differentiate between these two types of clouds. Movement, appearance, and color of the elements may vary but are not the most reliable factors for distinguishing between stratocumulus and altocumulus clouds.Rate this question:
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- 38.
"Clouds or obscuring phenomena that have bases at the same approximate level” is the definition of
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Sky condition.
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Sky cover.
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A ceiling.
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A layer.
Correct Answer
A. A layer.Explanation
The term "a layer" refers to clouds or obscuring phenomena that have bases at the same approximate level. This means that these clouds or phenomena are situated at a similar height in the atmosphere, creating a uniform layer of cloud cover. It is different from other options like sky condition, sky cover, and a ceiling, which may refer to different aspects of the sky or cloud cover.Rate this question:
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- 39.
Wind observing equipment is oriented to
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True north.
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True south.
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Magnetic north.
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Magnetic south.
Correct Answer
A. Magnetic north.Explanation
Wind observing equipment is oriented to magnetic north because the wind direction is measured relative to the Earth's magnetic field. Magnetic north is the direction towards the Earth's magnetic north pole, which is different from true north (the direction towards the Earth's geographic north pole). By aligning the equipment with magnetic north, accurate measurements of wind direction can be obtained.Rate this question:
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- 40.
The stratosphere is characterized by
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Noctilucent clouds, a “D” layer, and excellent flying conditions.
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A constantly warming temperature, mother-of-pearl clouds, and generally poor flying weather.
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A maximum temperature of 7°C, the strongest concentration of ozone, dense cirrus clouds, and occasionally poor flying conditions.
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A temperature that remains isothermal to about 100,000 feet, the strongest concentration of ozone, and excellent flying conditions.
Correct Answer
A. A temperature that remains isothermal to about 100,000 feet, the strongest concentration of ozone, and excellent flying conditions.Explanation
The correct answer is a temperature that remains isothermal to about 100,000 feet, the strongest concentration of ozone, and excellent flying conditions. This answer accurately describes the characteristics of the stratosphere. The stratosphere is known for having a temperature that remains relatively constant, or isothermal, up to a certain altitude. It also contains the highest concentration of ozone, which acts as a protective layer against harmful UV radiation. Additionally, the stratosphere is known for providing excellent flying conditions due to its stable atmosphere and lack of weather disturbances.Rate this question:
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- 41.
After warm air with an unstable wave is pushed aloft and cuts off from a cyclone, the cyclone will become
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Baroclinic and begin to deepen.
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Barotropic and begin to deepen.
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Baroclinic and begin to fill.
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Barotropic and begin to fill.
Correct Answer
A. Barotropic and begin to fill.Explanation
When warm air with an unstable wave is pushed aloft and cuts off from a cyclone, the cyclone will become barotropic and begin to fill. In meteorology, a barotropic system refers to a weather system in which the density surfaces are parallel to the surfaces of constant pressure. When a cyclone becomes barotropic, it means that the temperature and wind fields are aligned and there is no significant temperature gradient. As a result, the cyclone starts to fill, meaning that it weakens and loses its intensity.Rate this question:
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- 42.
Which force is the “equal and opposite reaction” to the center-seeking force?
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Inertia.
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Coriolis.
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Centrifugal.
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Centripetal.
Correct Answer
A. Centrifugal.Explanation
The correct answer is Centrifugal. In physics, the "equal and opposite reaction" to the center-seeking force, also known as the centripetal force, is the centrifugal force. When an object moves in a circular path, the centripetal force acts towards the center of the circle, while the centrifugal force acts outward, away from the center. These two forces are equal in magnitude and opposite in direction, allowing the object to maintain its circular motion. Inertia, Coriolis, and Centripetal forces are not the equal and opposite reaction to the center-seeking force.Rate this question:
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- 43.
The areas of low pressure that correspond to the belt of low pressure at 60°N created by the 3-cell circulation are the
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Icelandic and Asiatic lows.
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Icelandic and Aleutian lows.
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Aleutian and Asiatic lows.
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The Aleutian lows.
Correct Answer
A. Icelandic and Aleutian lows.Explanation
The 3-cell circulation model explains the general atmospheric circulation patterns on Earth. At around 60°N, there is a belt of low pressure caused by the convergence of air masses from the Ferrel and Polar cells. This belt is associated with two major low-pressure systems: the Icelandic low, located near Iceland, and the Aleutian low, located near the Aleutian Islands in Alaska. These low-pressure systems are characterized by stormy weather and play a significant role in shaping the weather patterns in their respective regions. Therefore, the correct answer is Icelandic and Aleutian lows.Rate this question:
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- 44.
Continental tropical air masses are usually associated with
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Thermal lows.
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Thermal highs.
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Migratory lows.
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Migratory highs.
Correct Answer
A. Thermal lows.Explanation
Continental tropical air masses are formed over warm land areas, typically in the tropics or subtropics. These air masses are characterized by high temperatures and low humidity. Due to their warm and dry nature, they tend to create areas of low atmospheric pressure, known as thermal lows. This is because the warm air rises, creating a region of relatively lower pressure compared to the surrounding areas. Therefore, the correct answer is thermal lows.Rate this question:
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- 45.
Horizontal divergence within an air mass will
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Cause the surface pressure to rise.
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Increase the mass in the vertical column above the surface.
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Increase the vertical extent of the column above the surface.
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Vertically contract the original column of air and then expand it horizontally.
Correct Answer
A. Vertically contract the original column of air and then expand it horizontally.Explanation
Horizontal divergence within an air mass refers to the spreading out of air horizontally. This causes the air column to vertically contract, meaning it becomes thinner and shorter. As the air column contracts vertically, it also expands horizontally, leading to a wider distribution of air. Therefore, the correct answer is that horizontal divergence will vertically contract the original column of air and then expand it horizontally.Rate this question:
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- 46.
As air converges at the surface and toward the center of a layer, there will be horizontal
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And vertical expansion.
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Contraction and vertical expansion.
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Expansion and vertical contraction.
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Contraction and vertical contraction.
Correct Answer
A. Contraction and vertical expansion.Explanation
As air converges at the surface and toward the center of a layer, it will experience contraction horizontally, meaning it will become more compact. This is because the air is being forced to come together and occupy a smaller area. At the same time, there will be vertical expansion, as the air is pushed upwards due to the convergence. This vertical expansion occurs because the air needs to rise to fill the void left by the converging air at the surface. Therefore, the correct answer is contraction and vertical expansion.Rate this question:
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- 47.
An unstable wave cyclone is one where the amplitude
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Decreases with time and the wave fills.
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Increases with time and the wave fills.
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Decreases with time and the wave deepens.
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Increases with time and the wave deepens.
Correct Answer
A. Increases with time and the wave deepens.Explanation
In an unstable wave cyclone, the amplitude of the wave increases with time and the wave deepens. This means that the wave becomes stronger and more pronounced as time passes, and the depth of the wave also increases. This can lead to more intense weather conditions and potentially severe storms.Rate this question:
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- 48.
In a cold occlusion, the coldest air is found
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Behind the cold front.
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Behind the warm front.
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Ahead of the cold front.
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Ahead of the warm front.
Correct Answer
A. Behind the cold front.Explanation
In a cold occlusion, the coldest air is found behind the cold front. Cold occlusions occur when a cold front overtakes a warm front, lifting the warm air and creating a mix of cold and warm air masses. The coldest air is located behind the cold front because it is being pushed forward by the advancing cold air mass, causing it to undercut and displace the warmer air. This results in the coldest air being found behind the cold front in a cold occlusion.Rate this question:
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- 49.
What color balloon would you use to determine the ceiling heights of thin clouds?
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Red.
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Blue.
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Black.
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Yellow.
Correct Answer
A. Red.Explanation
Red is the correct answer because red light has the longest wavelength among the given options. This longer wavelength allows red light to scatter less when it passes through the thin clouds, making it easier to determine the ceiling heights. Blue, black, and yellow balloons would not be as effective because their shorter wavelengths would scatter more in the clouds, making it difficult to accurately measure the ceiling heights.Rate this question:
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Quiz Review Timeline (Updated): Aug 1, 2024 +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Aug 01, 2024Quiz Edited by
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Jan 12, 2018Quiz Created by
Kyleburbach
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