Earth Science: The Air Around You, Book I

Chapter 2: Weather

Weather

1.
What causes wind?
A)weather patterns
B)low pressure
C)Air moves from regions of high pressure to regions of low pressure.
D)high pressure
2.
When two air masses of different densities collide, it's called__________.
A)a hurricane
B)a front
C)a storm
D)a high pressure zone
3.
____ is the measure of amounts of moisture in the air compared to the amount needed for saturation at a certain temperature.
A)Humidity
B)Relative humidity
C)Saturation
D)Air pressure
4.
An anemometer measures_____.
A)wind speed
B)atmospheric pressure
C)temperature
D)humidity
5.
The term <i>stationary front</i> describes a front __________.
A)that stops advancing
B)that continues forward
C)that changes
D)that is present for a brief amount of time
6.
Cumulous clouds are associated with __________.
A)approaching storms
B)fog
C)fair weather and rainstorms
D)sunny weather
7.
Stratus clouds form __________.
A)puffy white clouds
B)fibrous, or curly, clouds
C)fog
D)layers of even sheets in the sky
8.
Does warm air or cool air hold more humidity?
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
9.
The prefix <i>cirro</i> added to the suffix <i>cumulus, cirrocumulus,</i> refers to __________.
A)middle-level, flat, even clouds
B)high, curly clouds
C)high, puffy, white clouds
D)low, puffy, white clouds
10.
An occluded front occurs between _______ air masses.
A)three
B)an unknown number of
C)four
D)two
11.
What creates a wind shear?
A)thunder
B)increasing rainfall
C)similar wind speeds and directions
D)a difference in wind direction and speed
12.
When the temperature reaches its ____ , snow, rain,or hail is likely to form.
A)dew point
B)evaporation point
C)relative humidity
D)saturation point
13.
How does lightening occur during a storm?
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.
14.
What is the cause of the strong winds associated with thunderstorms?
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
15.
In what ways does the Sun influence weather?
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.
16.
Meteorologists refer to some floods as flash floods because __________.
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
17.
How do isobars help meteorologists predict weather?
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.
18.
What is the difference between a tornado and a hurricane?
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.
19.
What element of air determines its temperature?
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
20.
Of the four main types of precipitation, which refreezes after melting near the ground?
A)hail
B)snow
C)sleet
D)rain
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