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Weather
Factors that effect our weather
Term | Definition |
---|---|
convection current | a current caused by the rising of warm, less dense air and sinking of cooled, more dense air |
evaporation | Liquid warms to a gas (water vapor) |
condensation | gas (water vapor) cools to a liquid (how clouds are formed). |
maritime polar airmass | air mass that carries cold, moist air; is formed over the ocean in polar areas. |
warm front | a front formed when a warm air mass pushes above cold air; causes light and steady precipitation with warmer temperatures |
temperature | a measure of the speed of the molecules: a measure of how hot or cold something is. |
wind | the horizontal movement of air from an area of high pressure to an area of lower pressure |
high pressure | pressure formed when cool, more dense air sinks and dries out moisture; weather will be clear and dry. |
low pressure | pressure formed when warm, less dense air lifts and condenses into clouds; weather will be cloudy with precipitation. |
stationary front | a front formed when cold air mass meets a warm air mass and stops. Causes slow and steady precipitation |
maritime tropical air mass | air mass that carries warm and moist air; forms over warm seas. |
continental polar air mass | air mass that carries cold and dry air; forms over dry, cold land (like Canada). |
continental tropical air mass | air mass that carries warm and dry air; forms over dry, hot deserts. |
front | the boundary where two air masses meet |
cold front | a front formed when a cold air mass pushes warm air up; causes quick, intense storms with cooler temperatures |
anemometer | instrument for measuring wind speed |
barometer | instrument used for measuring air pressure |
thermometer | instrument used to measure temperature |