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Weather
Term | Definition |
---|---|
troposphere | atmosphere layer closest to Earth. Weather occurs here |
Stratosphere | second layer up.Where ozone layer is located |
Mesosphere | middle layer of atmosphere. meteoroids burn up here |
thermosphere | fourth layer up. Hottest layer. aurora are here |
exosphere | outer atmosphere layer. Satellites here. |
altitude | height above Earth's surface |
atmosphere | blanket of air surrounding Earth. |
air composition | 78%nitrogen, 21% oxygen, 1% water vapor and carbon dioxide. |
radiation | energy from the sun |
heat | energy transferred from a hotter object to a cooler one |
convection | heat transfer by the movement of a liquid or gas |
greenhouse effect | a natural process that keeps Earth's temperature comfortable |
global warming | a theory that predicts that the increase in carbon dioxide in the atmosphere will cause changes to Earth |
energy budget | the way Earth interacts with the sun's energy. Usually energy in = energy out. |
stratus cloud | low, flat gray, covers sky, smooth. indicates bad weather |
cirrus cloud | high, feathery, made of ice crystals. No precipitation but indicate bad weather |
cumulus cloud | white, puffy, flat bottom, fair weather |
cumulonimbus | many cumulus clouds, angry, dark, tall, very large. They bring thunderstorms and heavy rain |
anemometer | measures wind speed |
hygrometer | measures humidity |
barometer | measures air pressure |
thermometer | measures temperature |
air mass | a large body of air with similar temperatures, air pressure, and humidity |
weather front | forms when two different air masses meet |
cold front | forms when a cold air mass pushes into a warm air mass |
warm front | forms when a warm air mass pushes into a cold air mass |
wind | created when air moves from an area of high pressure to an area of low pressure |
weather | condition of atmosphere at a certain time and place |
meteorologist | scientists who study the weather |
weather report | report of current conditions |
weather forecast | a weather prediction |
hurricane | circular storm that forms over warm tropical water |
tornado | strong circular wind storm that forms over land |