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Windscloudsairmasses

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 1. 

  On a July day large cumulonimbus clouds are forming. It is very warm and humid and the barometer is falling. The weather prediction might be  
a.
  fog.  
c.
  a hurricane.  
b.
  a tornado.  
d.
  thunderstorms
 

 2. 

   An air mass forms over the Gulf of Mexico and moves northeast across Georgia. What weather conditions are likely to prevail in Georgia?  
a.
  cool and dry  
c.
  warm and dry  
b.
  cool and humid  
d.
  warm and humid  
 

 3. 

   Low, layered gray clouds that cover the entire sky and produce light rain are called  
a.
  stratus clouds.  
b.
  cumulus clouds.  
c.
  cirrus clouds.  
d.
  cirrocumulus clouds
 

 4. 

   Which natural force creates surface ocean currents?  
a.
  gravity  
c.
  earthquakes  
b.
  sunlight  
d.
  wind  
 

 5. 

   Air pressure can be measured in  
a.
  milligrams.  
c.
  millimeters.  
b.
  millibars.  
d.
  milliseconds.  
 

 6. 

   Cold air masses that form at high latitudes are called  
a.
  polar air masses.  
c.
  warm air masses.  
b.
  continental air masses.  
d.
  maritime air masses
 

 7. 

   A hurricane that hits the coast of the southeastern United States is most likely formed in the  
a.
  Pacific Ocean near Hawaii.  
b.
  Atlantic Ocean off the New England coast.  
c.
  equatorial region of the Atlantic Ocean.  
d.
  in the Arctic Ocean north of Canada
 

 8. 

   In some years there are more hurricanes than usual. This is probably because  
a.
  the ocean is warmer than usual.  
b.
  the ozone layer is very thin.  
c.
  there are more windy days than usual.  
d.
  the gravitational pull of the Moon is stronger.  
 

 9. 

   At the seashore late in the afternoon on a hot, sunny day, a person often feels a strong breeze coming in from the ocean. Which of the following is the reason for the breeze?  
a.
  The pounding waves generate air currents.  
b.
  The warm air over the ocean rushes in to replace the cool air that rises over the land.  
c.
  The heavy, cool air over the ocean rushes in to replace the warm air that rises over the land.  
d.
  There are no clouds to block the wind coming in from the ocean.  
 

 10. 

   Sunlight is not currently used as a major source of energy. Why not?  
a.
  Not enough sunlight reaches Earth to meet our energy needs.  
b.
  Economical ways to capture and store large amounts of solar energy have not been developed.  
c.
  Using sunlight for power will keep plants and animals from getting the energy they need.  
d.
  Our reserves of gas and oil will last for several hundred years so there is no need to change to solar energy.  
 

 11. 

   An air mass gets its temperature and humidity from  
a.
  the land or water over which it forms.  
c.
  the latitude at which it forms.  
b.
  changes in the upper atmosphere.  
d.
  the air masses that surround it
 

 12. 

   Clouds form when water vapor in the air  
a.
  condenses around dust particles  
c.
  rises too high to fall to the ground.  
b.
  rises and disappears.  
d.
  encounters a warm front.  
 

 13. 

   The jet stream has a great impact on changing weather conditions in an area because it  
a.
  does not change with the seasons.  
b.
  keeps the atmosphere supplied with moisture.  
c.
  is a determinant of major air movements.  
d.
  speeds up evaporation following precipitation.  
 

 14. 

   Which is the best indication of an approaching storm?  
a.
  a sudden increase in wind speed  
c.
  a clearing sky after a cold front passes  
b.
  a decrease in barometric pressure  
d.
  a sudden drop in the humidity  
 

 15. 

   A weather report will often have statements like, "There is a 20% chance of rain tomorrow."  What is meant by this forecast?  
a.
  In the past, when conditions were similar, it rained the next day about 20% of the time.  
b.
  It will rain 20% of the time during the next day.  
c.
  Weather forecasters are right about 20% of the time when they make such statements.  
d.
  It will rain over 20% of a given region, for example, a city or a county.
 

 16. 

   The weather forecast for a valley is a temperature of 35°F and light precipitation. Which weather conditions are most likely to be found on the mountain above the valley?  
a.
  warmer temperatures and light snow  
c.
  freezing temperatures and rain  
b.
  freezing temperatures and snow  
d.
  warmer temperatures and heavy rain  
 

 17. 

   Most water vapor in the atmosphere comes from  
a.
  evaporation from oceans.  
c.
  transpiration from plants.  
b.
  evaporation from soil.  
d.
  the burning of fossil fuels.  
 

 18. 

   Nights tend to be cooler than days because  
a.
  winds blow more strongly at night.  
b.
  the part of Earth in darkness receives less energy.  
c.
  cooler air in the upper atmosphere drops closer to Earth's surface.  
d.
  water vapor condenses when it is cooled.  
 

 19. 

   Wind results when two air masses collide that have a difference in  
a.
  size.  
c.
  latitude.  
b.
  pressure.  
d.
  altitude.  
 

 20. 

   Dew is formed by  
a.
  the condensation of water vapor.  
b.
  frost melting just before sunrise.  
c.
  groundwater being pulled to Earth's surface.  
d.
  transpiration performed by plants.  
 

 21. 

   The energy source that powers Earth's water cycle is  
a.
  Earth's rotation.  
c.
  radiation from Earth's core.  
b.
  heat from the Sun.  
d.
  the Sun's gravity.
 

 22. 

   Which of the following are large, puffy, white clouds?  
a.
  cumulus  
c.
  nimbus  
b.
  stratus  
d.
  cirrus
 

 23. 

   The temperature at which the air becomes saturated and condensation begins is called the  
a.
  relative humidity.  
c.
  absolute humidity.  
b.
  dew point.  
d.
  critical temperature.  
 

 24. 

   The phenomenon that causes the winds to be deflected to the left or right due to Earth's rotation is called  
a.
  Steno's laws.  
c.
  the nebular hypothesis.  
b.
  the Coriolis effect.  
d.
  differentiation.  
 

 25. 

   Which type of clouds form nearest to Earth's surface?  
a.
  cirrocumulus  
c.
  altocumulus  
b.
  stratus  
d.
  cirrus  
 

 26. 

   Large, dark clouds that produce thunderstorms are called  
a.
  stratocumulus clouds.  
c.
  altocumulus clouds.  
b.
  cirrostratus clouds.  
d.
  cumulonimbus clouds.  
 

 27. 

   Which best describes how stratus clouds appear?  
a.
  large puffy clouds  
c.
  sheetlike layers of clouds  
b.
  flat-based tower clouds  
d.
  high, white, thin clouds
 

 28. 

   Which must be present before a hurricane can develop?  
a.
  a high pressure cell  
c.
  a warm front  
b.
  warm, moist air  
d.
  cool, turbulent air  
 

 29. 

   Which step in the water cycle returns water to the atmosphere?  
a.
  evaporation  
c.
  precipitation  
b.
  condensation  
d.
  saturation  
 

 30. 

   Water in Earth's atmosphere comes mainly from  
a.
  the oceans.  
c.
  glaciers.  
b.
  tropical rain forests.  
d.
  underground rivers.  
 

 31. 

   Which process is most important to the water cycle?  
a.
  flooding  
c.
  evaporation  
b.
  erosion  
d.
  farm irrigation  
 

 32. 

   On a hot summer day, the wind suddenly starts to blow, clouds start to form, there is a brief thunderstorm, and it becomes cooler. What probably happened?  
a.
  Seasonal change began.  
c.
  A warm front passed through.  
b.
  It was near sunset.  
d.
  A cold front passed through.  
 

 33. 

   What causes the outside of the windshield of a car to get icy on a cold autumn night when there is no rain?  
a.
  Moisture comes from inside the car and freezes.  
b.
  Water vapor from the air freezes on the glass.  
c.
  Water that is already on the glass freezes.  
d.
  Hydrogen and oxygen in the air combine and form water, and it freezes.  
 

 34. 

   On a summer day which clouds are most likely to bring rain?  
a.
  thin, fluffy clouds  
c.
  thick, dark-gray clouds  
b.
  red clouds at sunset  
d.
  clouds that look like white sheep  
 

 35. 

   In the morning, Mary noticed there was dew on the grass. In the afternoon, the grass was dry. What most likely happened to the water?  
a.
  It went into the ground.  
c.
  It formed clouds.  
b.
  It went into the air.  
d.
  It no longer exists.  
 

 36. 

   Which diagram best represents the movement of air according to the surface temperature conditions shown?  
a.
  windsclouds_files/i0370000.jpg
c.
  windsclouds_files/i0370001.jpg
b.
  windsclouds_files/i0370002.jpg
d.
  windsclouds_files/i0370003.jpg
 

 37. 

   Which two physical changes are essential processes in the water cycle?  
a.
  oxidation and reduction  
c.
  mixing and separating  
b.
  evaporation and condensation  
d.
  ebbing and flowing  
 

 38. 

   Which processes are responsible for the distribution of freshwater to inland locations on the continents?  
a.
  rotation and revolution  
c.
  solar storms and magnetism  
b.
  tides and ocean currents  
d.
  moving air masses and gravity  
 

 39. 

   London is much farther north than Chicago, yet it is warmer in London in the winter than it is in Chicago. Why is this true?  
a.
  Waters around England are warmed by many underwater volcanoes.  
b.
  London receives more sunshine in the winter than other places farther south.  
c.
  London's climate is affected by warm ocean currents that flow from the south. 
d.
  The Sun's rays shine at a higher angle in London than in Chicago.  
 

 40. 

   Cold air is more dense than warm air. When a cold air mass moves into a warm air mass, causing a cold front, the warm air mass is  
a.
  compressed into a smaller mass, as it becomes even warmer.  
b.
  forced backward, as the approaching cold air replaces it.  
c.
  wedged upward, where its water vapor condenses.  
d.
  squeezed downward, causing clouds and rain.
 



 
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