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| 1.
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What causes wind?
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| | A) | weather patterns |
| | B) | low pressure |
| | C) | Air moves from regions of high pressure to regions of low pressure. |
| | D) | high pressure |
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| 2.
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When two air masses of different densities collide, it's called__________.
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| | A) | a hurricane |
| | B) | a front |
| | C) | a storm |
| | D) | a high pressure zone |
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| 3.
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____ is the measure of amounts of moisture in the air compared to the amount needed for saturation at a certain temperature.
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| | A) | Humidity |
| | B) | Relative humidity |
| | C) | Saturation |
| | D) | Air pressure |
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| 4.
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An anemometer measures_____.
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| | A) | wind speed |
| | B) | atmospheric pressure |
| | C) | temperature |
| | D) | humidity |
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| 5.
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The term <i>stationary front</i> describes a front __________.
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| | A) | that stops advancing |
| | B) | that continues forward |
| | C) | that changes |
| | D) | that is present for a brief amount of time |
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| 6.
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Cumulous clouds are associated with __________.
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| | A) | approaching storms |
| | B) | fog |
| | C) | fair weather and rainstorms |
| | D) | sunny weather |
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| 7.
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Stratus clouds form __________.
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| | A) | puffy white clouds |
| | B) | fibrous, or curly, clouds |
| | C) | fog |
| | D) | layers of even sheets in the sky |
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| 8.
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Does warm air or cool air hold more humidity?
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| | A) | warm air because air molecules in warm air move fast |
| | B) | cool air because air molecules in cool air move slowly |
| | C) | warm air because air molecules in warm air move slowly |
| | D) | cool air because air molecules in cool air move fast |
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| 9.
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The prefix <i>cirro</i> added to the suffix <i>cumulus, cirrocumulus,</i> refers to __________.
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| | A) | middle-level, flat, even clouds |
| | B) | high, curly clouds |
| | C) | high, puffy, white clouds |
| | D) | low, puffy, white clouds |
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| 10.
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An occluded front occurs between _______ air masses.
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| | A) | three |
| | B) | an unknown number of |
| | C) | four |
| | D) | two |
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| 11.
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What creates a wind shear?
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| | A) | thunder |
| | B) | increasing rainfall |
| | C) | similar wind speeds and directions |
| | D) | a difference in wind direction and speed |
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| 12.
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When the temperature reaches its ____ , snow, rain,or hail is likely to form.
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| | A) | dew point |
| | B) | evaporation point |
| | C) | relative humidity |
| | D) | saturation point |
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| 13.
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How does lightening occur during a storm?
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| | A) | The relative humidity drops. |
| | B) | Converging fronts collide. |
| | C) | The atmospheric pressure suddenly rises. |
| | D) | Different parts of a cloud become oppositely charged, and current flows between them. |
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| 14.
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What is the cause of the strong winds associated with thunderstorms?
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| | A) | strong updrafts of warm, moist air and sinking, rain-cooled air |
| | B) | weak updrafts of warm, moist air |
| | C) | rain-cooled air |
| | D) | strong updrafts of dry air |
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| 15.
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In what ways does the Sun influence weather?
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| | A) | The Sun heats water on Earth. |
| | B) | The Sun evaporates water in the atmosphere to create clouds. |
| | C) | all answers are correct |
| | D) | The Sun heats air in the atmosphere. |
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| 16.
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Meteorologists refer to some floods as flash floods because __________.
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| | A) | there is often little warning before they occur |
| | B) | they often occur during lightening storms |
| | C) | they last for extended periods of time |
| | D) | they know about them far in advance |
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| 17.
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How do isobars help meteorologists predict weather?
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| | A) | They help meteorologists tell how fast wind is blowing by noting how far apart isobars are placed on a weather map. |
| | B) | They help meteorologists see areas of equal temperature. |
| | C) | They help meteorologists predict dry weather. |
| | D) | They help meteorologists tell how fast wind is blowing by noting how closely isobars are placed on a weather map. |
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| 18.
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What is the difference between a tornado and a hurricane?
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| | A) | Tornadoes occur over sea and hurricanes occur over land. |
| | B) | Tornadoes happen during winter and hurricanes happen in the summer. |
| | C) | Tornadoes occur over land and hurricanes occur over sea. |
| | D) | They are the same things. |
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| 19.
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What element of air determines its temperature?
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| | A) | the composition of air molecules |
| | B) | the average motion of air molecules |
| | C) | the direction of air molecules |
| | D) | the arrangement of air molecules |
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| 20.
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Of the four main types of precipitation, which refreezes after melting near the ground?
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| | A) | hail |
| | B) | snow |
| | C) | sleet |
| | D) | rain |
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