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2. Weather

DDMS 7th grade - Chapter 3, sec. 2-4

Temperature The measure of the average amount of energy in the particles of a substance
Thermometer An instrument used for measuring temperature
Conduction The transfer of thermal energy through two substances touching
Convection The transfer of thermal energy by the movement of a fluid
Convection Currents The upward movement of warmer fluid and the downward movement of a cooler fluid creating a circular motion
Wind The horizontal movement of air from an area of high pressure to an area of low pressure
Anemometer An instrument used to measure wind speed
Sea Breeze A local wind that blows from the water to the land
Land Breeze A local wind that blows from the land to the water
Jet Stream Bands of high speed wind that occur about 10 Km above the Earth's Surface
Relative Humidity The percentage of water vapor in the air, compared to the maximum amount that it can hold at a certain temperature
Psychrometer An instrument used to measure the relative humidity
condensation The process of the water vapor in the air becoming a liquid
Dew Point The temperature at which condensation begins
Cirrus Wispy, feathery looking clouds, that form at high levels in the atmosphere
Cumulus Fluffy, round-looking clouds, that form less than 2 km from the ground
Stratus Clouds that form in thin, flat layers
Precipitation Any form of water that falls from the clouds and reaches the Earth's Surface
Rain Gauge An instrument used to measure precipitation
Radiation The direct transfer of energy by electromagnetic waves
Created by: jfakins