# Weather:

Approved & Edited by ProProfs Editorial Team
The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.
| By Alyssatepper
A
Alyssatepper
Community Contributor
Quizzes Created: 2 | Total Attempts: 1,023
Questions: 15 | Attempts: 753

Settings

• 1.

### As the difference between the dew point temperature and the air temperature decreases, the probability of precipitation?

• A.

Increase

• B.

Decrease

• C.

Remain the Same

A. Increase
Explanation
As the difference between the dew point temperature and the air temperature decreases, it means that the air is becoming more saturated with moisture. When the air is saturated, it is more likely to form clouds and precipitation. Therefore, the probability of precipitation increases as the difference between the dew point temperature and the air temperature decreases.

Rate this question:

• 2.

### According to the Earth Science Reference Tables, an air pressure of 30.15 inches of Hg is equal to how many millibars?

• A.

1017mb

• B.

1019mb

• C.

1021mb

• D.

1023mb

C. 1021mb
Explanation
The Earth Science Reference Tables state that 1 inch of Hg (mercury) is equal to 33.86 millibars. Therefore, to convert 30.15 inches of Hg to millibars, we multiply 30.15 by 33.86. The result is approximately 1019.01 millibars. The closest option to this value is 1021mb.

Rate this question:

• 3.

### An air mass from the Gulf of Mexico, moving north into New York State, has a high relative humidity. What other characteristics will it probably have?

• A.

Warm temperatures and low pressure

• B.

Cool temperatures and low pressure

• C.

Warm temperatures and high pressure

• D.

Cool temperatures and high pressure

A. Warm temperatures and low pressure
Explanation
When an air mass from the Gulf of Mexico moves north into New York State, it brings with it high relative humidity. This indicates that the air mass contains a significant amount of moisture. As warm air can hold more moisture than cool air, it is likely that the air mass will also have warm temperatures. Additionally, low pressure systems are associated with rising air, which can lead to the formation of clouds and precipitation. Therefore, the air mass from the Gulf of Mexico moving into New York State will probably have warm temperatures and low pressure.

Rate this question:

• 4.

### What causes the seasons on Earth?

• A.

Changes in Earth's distance from the Sun

• B.

Earth's axial tilt and its orbit around the Sun

• C.

Rotation of Earth on its axis

• D.

Ocean currents

B. Earth's axial tilt and its orbit around the Sun
Explanation
The changing seasons on Earth are primarily caused by its axial tilt and orbit around the Sun. As Earth orbits the Sun, the axial tilt results in different parts of the planet receiving varying amounts of sunlight at different times of the year. This phenomenon leads to the four distinct seasons: spring, summer, autumn, and winter. The distance from the Sun and Earth's rotation also influence climate patterns, but the primary driver of the seasons is the combination of axial tilt and orbital motion. Ocean currents play a role in redistributing heat but are not the primary cause of the seasons.

Rate this question:

• 5.

### Why do clouds usually form at the leading edge of cold air mass?

• A.

Cold air contains more water vapor than warm air does.

• B.

Cold air contains more dust particles than warm air does.

• C.

Cold air flows over warm air, causing the warm air to descend and cool.

• D.

Cold air flows under warm air, causing the warm air to rise and cool.

D. Cold air flows under warm air, causing the warm air to rise and cool.
Explanation
When cold air flows under warm air, it causes the warm air to rise. As the warm air rises, it cools down and reaches its dew point, leading to the formation of clouds. This is because the rising warm air encounters cooler temperatures at higher altitudes, causing the water vapor in the air to condense into tiny water droplets or ice crystals, which make up clouds. Therefore, the leading edge of a cold air mass is where clouds usually form due to the upward movement of warm air.

Rate this question:

• 6.

### The primary cause of winds is the...

• A.

Unequal heating of the Earth's atmosphere

• B.

Unifiorm density of the atmosphere

• C.

Friction between the atmosphere and the lithosphere

• D.

Rotation of the Earth

A. Unequal heating of the Earth's atmosphere
Explanation
Winds are primarily caused by the unequal heating of the Earth's atmosphere. As the sun heats the Earth's surface, different areas heat up at different rates due to variations in land and water distribution, as well as factors like altitude and cloud cover. This creates temperature and pressure gradients, causing air to move from areas of high pressure to areas of low pressure, resulting in wind. The unequal heating of the atmosphere is the driving force behind the movement of air masses and the formation of wind patterns.

Rate this question:

• 7.

### According to the Dew-point Temperature Chart in the Earth Science Reference Tables, what is the dew-point if the air temperature is 13°C and the wet-bulb temperature is 9°C?

• A.

-14 degrees C

• B.

0 degrees C

• C.

5 degrees C

• D.

9 degrees C

C. 5 degrees C
Explanation
The dew-point temperature is the temperature at which air becomes saturated and condensation begins to form. In this question, the air temperature is 13°C and the wet-bulb temperature is 9°C. By referring to the Dew-point Temperature Chart in the Earth Science Reference Tables, we can find the corresponding dew-point temperature for these values. According to the chart, when the air temperature is 13°C and the wet-bulb temperature is 9°C, the dew-point temperature is 5°C.

Rate this question:

• 8.

### An airmass located over the central United States will most likely move toward the

• A.

Northeast

• B.

Northwest

• C.

Southeast

• D.

Southwest

A. Northeast
Explanation
An airmass located over the central United States will most likely move toward the Northeast because prevailing winds in the United States generally blow from west to east. This means that air masses tend to move in the same direction as the prevailing winds. Since the central United States is located to the west of the Northeast, the airmass would be pushed eastward by the prevailing winds, resulting in its movement toward the Northeast.

Rate this question:

• 9.

### The energy gained by water during evaporation is later released by the water vapor during the process of..

• A.

Transpiration

• B.

Convection

• C.

Melting

• D.

Condensation

D. Condensation
Explanation
During the process of evaporation, water gains energy and transforms into water vapor. This water vapor, when cooled down, loses energy and condenses back into liquid form. This release of energy during condensation is the reason for the correct answer. Transpiration refers to the release of water vapor by plants, not by water itself. Convection is the transfer of heat through a fluid, not specifically related to water vapor. Melting is the process of solid turning into liquid, which is not relevant to the given question.

Rate this question:

• 10.

### The air temperature and the wet-bulb temperature were measured and both were found to be 18°C. Two hours later, measurements were taken again and the air temperature was 20°C, while the wet-bulb temperature remained 18°C. The relative humidity of the air during those two hours...

• A.

Increased

• B.

Decreased

• C.

Remained the Same

B. Decreased
Explanation
The wet-bulb temperature measures the lowest temperature that can be achieved through evaporative cooling. If the wet-bulb temperature remains the same while the air temperature increases, it means that the air has become drier. This indicates that the relative humidity has decreased over the two-hour period.

Rate this question:

• 11.

### An air mass originating over the North Pacific Ocean would most likely be...

• A.

Continental Polar

• B.

Continental Tropical

• C.

Maritime Polar

• D.

Maritime Tropical

C. Maritime Polar
Explanation
An air mass originating over the North Pacific Ocean would most likely be Maritime Polar because it is coming from a large body of water and is located in the polar region. Maritime Polar air masses are characterized by their cool and moist nature, as they form over colder ocean waters. These air masses often bring cloudy and wet weather conditions when they move over land.

Rate this question:

• 12.

### On a weather map, an air mass that is very warm and dry would be labeled how?

• A.

MP

• B.

MT

• C.

CP

• D.

CT

D. CT
Explanation
An air mass that is very warm and dry would be labeled as cT. The "c" stands for continental, indicating that the air mass originated over land rather than the ocean. The "T" stands for tropical, indicating that the air mass originated in a warm region. Therefore, a cT air mass would be both warm and dry, making it the correct label for a very warm and dry air mass on a weather map.

Rate this question:

• 13.

### How does air circulate within a cyclone (low-pressure area) in the Northern Hemisphere?

• A.

Counterclockwise and toward the center of the cyclone

• B.

Counterclockwise and away from the center of the cyclone

• C.

Clockwise and toward the center of the cyclone

• D.

Clockwise and away from the center of the cyclone

A. Counterclockwise and toward the center of the cyclone
Explanation
In the Northern Hemisphere, air circulates within a cyclone in a counterclockwise direction and towards the center of the cyclone. This is due to the Coriolis effect, which is caused by the rotation of the Earth. As the air moves towards the center of the cyclone, it spirals inward in a counterclockwise direction, creating a low-pressure area at the center. This counterclockwise circulation is characteristic of cyclones in the Northern Hemisphere.

Rate this question:

• 14.

### Which combination of air temperature and dewpoint temperature would most likely occur in humid air?

• A.

Air temperature 10°C, dewpoint temperature -4°C

• B.

Air temperature 15°C, dewpoint temperature 3°C

• C.

Air temperature 24°C, dewpoint temperature 23°C

• D.

Air temperature 26°C, dewpoint temperature 10°C

C. Air temperature 24°C, dewpoint temperature 23°C
Explanation
Humid air occurs when the dewpoint temperature is close to or equal to the air temperature. In this case, the air temperature of 24°C and dewpoint temperature of 23°C indicate that the air is very close to saturation and there is a high amount of moisture in the air. This combination suggests that the air is humid.

Rate this question:

• 15.

### A mT air mass would most likely originate over which type of Earth surface?

• A.

Cold and Moist

• B.

Warm and Moist

• C.

Cold and Dry

• D.

Cold and Moist

B. Warm and Moist
Explanation
A mT (maritime tropical) air mass is characterized by warm and moist conditions. It forms over tropical or subtropical oceans where warm air rises and picks up moisture. This air mass is commonly associated with humid and unstable weather conditions, often leading to the formation of thunderstorms and heavy precipitation. Therefore, the most likely origin for an mT air mass would be over a warm and moist Earth surface.

Rate this question:

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

• Current Version
• Jan 16, 2024
Quiz Edited by
ProProfs Editorial Team
• Apr 23, 2015
Quiz Created by
Alyssatepper

Related Topics