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26 Cards in this Set
- Front
- Back
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What happens in the water cycle? |
Evaporation transportation condensation runoff percipitation
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What is humidity?
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A measure of the amount of water vapor in the air; more water vapor in warm air
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How do clouds form?
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Water vapor condenses to form ice crystals, or condensation
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What is needed for condensation?
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Cooling of air and presence of particles |
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What are types of particles?
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Salt crystals, dust, smoke
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What is dew?
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Water vapor that condenses onto solid surfaces
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What is a dew poindt?
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The temperature at which condensation begins
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What happens to air as the air mass rises?
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It expands and cools
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Does the temperature increase or decrease as the air expands?
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decrease
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what is percipitation?
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any form of weight that falls from clouds and reaches earth's surface
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when does precipitation occur?
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when cloud droplets get heavy enough to fall through the air
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what is rain?
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most common type of precipitation; are at least 1/2 mm (smaller are called drizzle)
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what is hail?
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round pellets of ice larger than 5 mm"form inside Cumulonimbus Cloud need strong updrafts up and down causeit to grow because it's layers freeze
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what is snow?
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Water vapor converted directly to ice crystal;fall through air and stays below freezing
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What is sleet?
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Snow partially melted in a "warm" layer of air then freezes once more
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What is freezing rain |
Snow completely melts then freezes when it touches a cold surface
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Descibe a cold front
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Cold air mass pushes under warm air mass, can cause thunder storms, possible tornadoes
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Describe a warm fronnt
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Warm air mass slides up slow cold air mass, gentle rain, light snow
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Describe a stationary front
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Warm air and cold air collide, neither have the force to push each other, fog, rain or snow for many days
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Describe an occluded front
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Warm air is squeezed by two cold air masses, light rain and heavy rain
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What is the life cycle of a hurricane?
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Formation in the ocean, tropical depression, tropical storms (winds over 30 mph) hurricane (74mph+) hurricane weakens
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What is happening in the eye of the storm?
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cool air is sinking
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What fuels a hurricane?
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Warm air from the ocean
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What minimum temperature does the ocean need to be for a hurricane?
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80Β°F
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When do hurricanes develop in the Atlantic?
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August-october
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