6th grade Ch 16 Weather Patterns
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| air pressure | the force of air molecules pushing on an area
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| barometer | any instrument tht measures air pressure
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| weather | the condition of Earth's atmosphere at a particular time and place
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| wind | air that moves horizontally or parallel to the ground
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| global winds | winds that travel thousands of kilometers in steady patterns and last for weeks
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| Coriolis effect | the influence of the earth's rotation on winds and other moving objects over the Earth
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| doldrums | low pressure zone near the equator
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| horse latitudes | high pressure zones located about 30 degrees north and 30 degrees south of the equator
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| trade winds | blow from the east, moving from the horse latitudes toward the equator
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| westerlies | blow from the west, moving from the horse latitudes toward the poles
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| easterlies | blow from the east, moving from the polar regions toward the mid latitudes
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| stormy weather | occurs when cold air of the easterlies meets the warmer air of the westerlies
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| westerlies | bring storms across much of the US
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| horse latitudes | causes weather to be clear and dry
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| jet streams | usually lfow in the upper troposphere from west to east for thousands of kilometers
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| sea breeze | caused by warmer air rising over the land during the day and cooler air blowing from the water
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| land breeze | cooler air blows out from the land and warmer air rises over the water at night
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| winter monsoon | occur in regions where the land cecomes much cooler than the sea during the winter
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| summer monsoon | low pressure builds over the land and warm, moist air comes onto land
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| evaporation | the process by which a liquid changes into a gas
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| energy | what is needed for water to evaporate
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| condensation | the process by which a gas, such as water vapor, changes into a liquid
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| condensation | occurs when moist air cools
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| precipitation | any type of liquid or solid water that falls to Earth's surface
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| humidity | the amount of water vapor in the air
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| saturation | a condition in which the rates of evaporation and condensation are equal
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| unsaturated air | more water evaporates into the air than condenses back into the water
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| saturated air | amount of water that evaporates equals the amount that condenses
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| relative humidity | compares the amount of water vapor in air with the maximum amount of water vapor that can be present at that temperature
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| dew point | the temperature at which air with a given amount of water vapor will reach saturation
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| clouds | condensed water vapor
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| cirrus | appear feathery and wispy
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| cirrus | "curl of hair"
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| cumulus | "heap" or "pile"
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| cumulus | can grow very tall
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| stratus | "spread out"
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| stratus | form in flat layers
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| cirrus | form in very cold air at high altitudes
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| cirrus | made of ice crystals
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| cumulus | fluffy white clouds with darker bases
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| cumulus | look like cotton balls
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| cumulus | if they continue to grow taller, they can produce a brief shower
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| cumulonimbus | talles clouds and are called thunderheads, can produce heavy rainfall
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| stratus | causes the sky to look gray
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| stratus | produce steady light precipitation
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| fog | a cloud that rests on the ground or body of water
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| fog | a thick mist formed by water vapor in the air condenses as it cools
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| precipitation | forms from water droplets or ice crystals
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| precipitation | comes from clouds
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| precipitation | formed through the combining of cloud droplets
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| precipitation | form through the growth of ice crystals
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| rain guage | used to measure precipitation
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| long ruler | used to measure snow depth
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| rain or drizzle | most common type of precipitation
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| raindrops | form from liquid cloud droplets or from ice crystals taht melt as they fall
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| drizzle | a light rain with very small drops
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| drizzle | usually comes from stratus clouds
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| freezing rain | raindrops frozen when they hit the ground or other surface
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| freezing rain | covers surfaces with a coating of ice
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| sleet | small pellets of ice that form when rain passes through a layer of cold air
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| snowflake | have six sides or branches
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| snow | formed as ice crystals grow and merge in clouds
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| hail | largest type of frozen precipitation and ofen occurs in warm weather
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| hail | lumps or balls of ice that fall from cumulonimbus clouds
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| acid rain | rain that becomes more acidic than normal because of pollution
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| acid rain | caused by factories, automobiles, natural sources of released sulfur dioxide and nitrogen oxides
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| air pressure | decreases as you move higher in the atmosphere
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| winds | blow from areas of high pressure toward areas of low pressure
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| Earht's rotation | causes long distances wind to bend or curve
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