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Science Chapter 8
N/A
19
Science
4th Grade
01/07/2014

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Term
Water Cycle
Definition
water moves from the surface of Earth to the air and then back again.
Term
Precipitation
Definition
water that falls back to Earth(rain,snow,sleet,hail)
Term
Evaporation
Definition
process by which a liquid changes to a gas(gets hot).
Term
Condensation
Definition
gas changes into a liquid(cools).
Term
Rain
Definition
most common type of precipitation and is liquid. Falls at temperatures higher than 0 degree Celsius(32 degree Fahrenheit).
Term
Sleet
Definition
frozen rain,caused when rain falls through a layer of freezing cold air.
Term
Snow
Definition
made of ice crystals.  Snow is caused whenthe air temperature is so cold that water vapor turns directly into ice.
Term
Hail
Definition
round pieces of ice.  Caused when the rain freezes and then falls to a warmer part of the air.
Term
Tornado
Definition
fast spinning spiral of wind that stretches from the clouds of a thunderstorm to the ground.
Term
Hurricane
Definition
large tropical storms that form over warm tropical oceans.
Term
Sea Breeze
Definition
breeze moving from the water to land.(During the day,air over the water is cooler than air over the land.  During the night,the land becomes cooler than the water.)
Term
Land Breeze
Definition
breeze moving from the land to the to the water.
Term
Rain Shower
Definition
area on the far side of a mountian range that gets little or no rain or cloud cover.
Term
Air Mass
Definition
large body ofair with a similar temperature and moisture level.
Term
Cold Front
Definition
forms where a cold air mass moves under a warm air mass.
Term
Warm Front
Definition
forms where a cold air mass moves under a warm air mass.
Term
Barometer
Definition
measures air pressure.
Term
Anemometer
Definition
measures wind speed.
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