Air may best be described as: |
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a mixture |
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Dust in the atmosphere is associated with which of the following: |
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all of the above |
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With an increase in altitude, air pressure: |
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decreases at a decreasing rate |
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This atmospheric component absorbs damaging ultraviolet radiation from the sun. |
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none of these |
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Weather affects: |
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all of these |
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This variable atmospheric component can exist in all three states of matter on Earth. |
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water |
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Which of the following is the most important atmospheric component with regard to the Earth's climate? |
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water vapor |
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The "weather sphere" is in the... |
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troposphere |
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Atmospheric pressure is caused by... |
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the weight of the air above |
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Water vapor represents what fraction of the air near the Earth's surface? |
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less than 4% |
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The basic elements of weather and climate include all of the following, except: |
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the chemical composure of the air |
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The primary difference between the concepts of weather and climate is the... |
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time period involved |
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The troposphere is most likely to be thickest... |
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over the equator |
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This country has the greatest variety of weather in the world: |
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United States |
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The lowest temperatures in the atmosphere exist in the... |
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mesosphere |
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Which one of the following is the most abundant gas in the atmosphere? |
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nitrogen |
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On the average, for every 1 km increase in altitude in the troposphere the air temperaute... |
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drops about 6.5degreeC |
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The nornal lapse rate applies to the... |
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troposphere |
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Clouds play an important role in the Earth's energy budget because they... |
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reflect solar energy |
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On the average, how much of the Sun's energy that is intercepted by the Earth system is reflected to space? |
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30% |
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The length of daylight gets progressively longer going south from the equator on... |
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June 21 |
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All radiation emitted by the Earth and its atmosphere is in the category of... |
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infrared |
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Most of the solar energy absorbed by the planet Earth and its atmosphere is absorbed by... |
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the Earth's surface |
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The North Pole has a higher noon Sun angle than New York City (40degreeN lat) on... |
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none of these |
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During natural processes, heat transfer is always from... |
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warmer to cooler substances |
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Suppose the albedo of a planet is measured to be 40%. This means that... |
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40% of the Sun's energy is reflected |
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At 45degreeS latitude, the angle of the noon Sun is lowest and the length of daylight is shortest on... |
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June 21 |
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Which of the following correctly describes the equinoxes? |
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days and nights are equal in length in all parts of the world |
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_________ is a mechanism of heat transfer. |
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all of these |
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The spring equinox in the Northern Hemisphere starts on... |
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March 21 |
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Why do atmospheric temperatures decrease with height in the troposphere? |
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atmosphere is heated by the ground |
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Earth is closest to the Sun during... |
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No. Hemisphere winter |
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Earth's perihelion... |
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would not exist if the Earth's orbit were circular |
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The atmosphere is heated primarily by... |
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absorption of Earth radiation |
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Marquette, MI is at 47degree N latitude. What is the angle of the Sun's noon rays on Dec. 22? |
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19 1/2degree |
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Low Sun angels result in reduced solar energy because... |
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both a) and c) |
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If an imbalance occurs between incoming and outgoing energy at the Earth's surface... |
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temperatures either increase or decrease |
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The primary cause of Earth's seasons is... |
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inclination of Earth's rotation axis |
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Locations on Earth which have the largest annual temperature change from summer to winte are... |
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at high altitudes |
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A poleward moving (northward moving in the Northern Hemisphere) ocean current is... |
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a warm current |
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Which of the following statements is true? |
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none of these is true |
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A location on a windward coast refers to a place where the prevailing wind is... |
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toward the land |
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A location along a seacoast will probably have summer temperatures that are ______, compared to an inland location. |
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cooler |
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In the course of an average 24-hour period, the ocean will warm... |
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less than 1degreeC |
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The annual range of temperature may be described as... |
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the difference between the average temperature of the warmest and coldest months |
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If water freezes at a temperature of 273degreeK, it must boil at what temperature? |
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373degreeK |
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The annual temperature range at most latitudes in the southern hemisphere is much smaller than in the northern hmisphere. Why? |
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There is more area covered by water in the southern hemisphere |
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On a particular day a place accumulates 15 heating degree days. What was the daily mean temperature on that day? |
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none of the above |
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The most important cause of temperature variations is... |
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differences in receipt of solar radiation |
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City A is in the So. Hem. and City B is in the No. Hem. Both cities reflect the characteristics of the hemispheres they are located. Which city should have the warmer winter temperature? |
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City A |
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Referring to the two cities mentioned in the previous question, which city should have the higher annual temperature range? |
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City B |
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The specific heat of water is high. What does this mean? |
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water must gain or lose large amounts of energy when its temperature changes |
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The annual range of temperature may be described as the difference between the... |
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average temperature of the coldest and warmest month |
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The percent reduction in solar radiation reaching the surface in urban areas is greatest... |
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at high latitudes in the winter |
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If the maximum temperature for a particular day is 26degreeC and the minimum is 14degreeC, the daily mean would be... |
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20degreeC |
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When comparing a place at the bottom of a mountain and a place 2500 meters up the mountainside, which of the following statements is correct? |
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both of the above statements are correct |
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The effect of urban heat production on the urban heat island is greatest in the... |
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winter |
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A place located along a windward coast... |
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will probably have cooler summer temperatures than an inland place at the same latitude |
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Widely spaced isotherms indicate... |
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a gradual temperature change rate |
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Adiabatic processes are only important for air... |
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which is rising or sinking |
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The change of state from gas to liquid is called... |
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condendsation |
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The temperature of rising air parcels ______ as they move upward. |
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may either increase or decrease |
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The relative humidity is 40% and the mixing ratio at saturation is 20 grams per kilogram. What's the actual mixing ratio? |
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8 gm/kg |
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The capacity of the air to hold water vapor... |
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increases with an increase in temperature |
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The gas most responsible for atmospheric processes is... |
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water vapor |
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The vertical motions that occur when the air is unstable are termed... |
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convection |
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Sinking or subsiding air cannot form clouds due to the... |
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warming temperatures |
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The atmosphere is most unstable when the temperature of the air ______ with height. |
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drops rapidly |
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As the temperature of air is reduced to its dewpoint, which of these is most likely to occur? |
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condensation |
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During a clear, relatively calm day, the relative humidity will tend to _______ from sunrise to early afternoon. |
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decrease |
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Which of the following would not be associated with stable atmospheric conditions? |
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afternoon thundershowers |
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When using a psychrometer, if the two temperatures read nearly the same you can conclude that... |
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the air has a high relative humidity |
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Relative humidity depends on the water vapor present in the air and the... |
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temperature |
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The actual amount of water vapor in the air is greatest for which of the following combinatons of temperature and relative humidity? |
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20degreeC, 100% |
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________ occurs when a solid turns directly to a gas without passing through the liquid phase. |
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sublimation |
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We're likely to have our highest relative humidity... |
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about sunrise |
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The dew point is the temperature at which... |
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water vapor condenses to a liquid |
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Deserts such as the Great Basin, Gobi, and Takla Makan are examples of... |
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rain shadow deserts |
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A convergence of winds near the surface is associated with cloud production because it... |
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forces the air to rise |
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Which type of cloud is most likely to form a halo around the Sun or Moon? |
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cirrostratus |
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This cloud sometimes produces mare's tails... |
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cirrus |
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The temperature inside a cloud would therefore be... |
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about equal to the dew point |
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If ice crystals form in this cloud, they will experience the cloud environment as having a relative humidity of... |
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more than 100% |
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The ______ cloud may have an "anvil head". |
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cumulonimbus |
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When warm moist air moves over a cold surface, ________ fog may result. |
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advection |
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A cumulus cloud is recognized mainly by its... |
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obvious vertical dimension |
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The necessary conditions for hail formation include strong upward vertical motion and... |
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large number of supercooled droplets |
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Clouds that form in air that is very stable will usually be... |
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stratus |
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Of the following cloud types, which is most likely to produce the most rain? |
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nimbostratus |
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A wintertime form of precipitation that consists of small ice particles is called... |
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none of these |
| |
The most common way for air to be cooled in order that a cloud may form is by... |
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rising and expanding |
| |
Freezing rain (ice storm) or sleet occurs when... |
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upper air is warm and surface air is cold |
| |
Condensation nuclei may be formed from... |
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all of the above |
| |
Why are high altitude clouds always so thin? |
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very little water vapor is present |
| |
Clouds which have extensive vertical dimensions are... |
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cumulus |
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This fog is found in valleys at night and in the early morning... |
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radiation fog |
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Hail is most commonly associated with... |
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cumulonimbus clouds |
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Which of these is a mid-level cloud? |
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none of these |
| |
One aspect of the _______ theory relies on the fact that different-sized cloud droplets fall at different speeds. |
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collision-coalescence process |
| |
The _______ may result in snow or rain. |
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Bergeon process |
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