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16 Cards in this Set
- Front
- Back
As water vapor rises, it becomes colder and ____________ on particles of dust to form _________. |
condenses, clouds |
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Clouds composed of ice crystals high in the sky are called ___________. |
cirrus |
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Puffy clouds at middle altitudes are called ___________. |
cumulus |
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Layered clouds at low altitudes are called _________. |
stratus |
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Cloud close to the ground is called _____. |
fog |
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Raindrops that fall through a layer of cold air can freeze to form _________. |
sleet |
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At low temperatures, water vapor turns directly into solid crystals called __________. |
snow |
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Rainfall is measured with an instrument called a ________ ________ . |
rain gauge |
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When a cold, dry, air mass meets a warm, moist, air mass, the cold air pushes the warm air ___________ , producing __________ weather. |
upward, stormy |
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Almost all weather fronts in North America are pushed from west to east by the _____________. |
jetstream |
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Areas on a weather map that have the same air pressure are connected with lines called __________. |
isobars |
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Low pressure systems bring ________ , and _________ weather; high pressure systems bring ______ , and _______ . |
warm , and stormy dry , and cool |
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On a weather map, blue triangles on a line represent a _______ ________ ; red half circles on a line represent a ________ _____. |
cold front, warm front |
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To forecast the weather, meteorologists collect and analyze data such as _________ , ____ _______ , and the direction of moving fronts. |
temperature, air pressure |
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Scientists use weather balloons , radar and ____________ that orbit Earth to study the weather. |
Satellites |
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Critical Thinking How and why do clouds form along a front? |
Clouds form when warm moist air rises and cools. Water vapor condenses on particles of dust . It forms from a front because that is where the cool air pushes upward. |