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Weather Ch. 2

Chapter 2 Weather Factors

TermDefinition
Radiation The direct transfer of energy by electromagnetic waves.
Electromagnetic Waves a form of energy that travels through space.
Infrared radiation a form of energy with wavelengths that are longer than red light. Infrared radiation is invisible, but can be felt as heat.
Scattering The reflection of light in all different directions.
The GreenHouse Effect The process by which gases hold heat in the air.
Tempreture The average amount of energy of motion of each molecule of a substance.
Thermal Energy The total energy of motion in the molecules of a substance.
Thermometer A thin glass tube with a bulb on one end that contains liquid mercury or alcohol.
Heat The energy transferred from a hotter object to a cooler object is referred to as heat.
Conduction The direct transfer from one object to another by touching
Convection The transfer of heat by movement of a fluid.
Wind The movement of horizontal air from an area of high pressure to an area of low pressure.
Anemometer A tool used to measure wind that has 3-4 cups mounted at the end spokes that spin on an axle.
Wind-chill Factor The increased cooling that a wind can cause.
Local Winds Short winds that blow over a distance.
Sea Breeze Winds that are from an ocean or lake.
Land Breeze A breeze that flows from land to a body of water.
Monsoon Sea and land breezes that flow over a large region that change direction with the seasons.
Global Winds Winds that blow steadily from a specific direction over long distances.
Coriolis Effect The way Earth's rotation makes winds curve.
Latitude The distance from the equator measured in degrees.
Jet Streams 10 km above the Earth are bands of high speed winds.
Evporation
Relative Humidity The percentage of water vapor in the air compared to the maximum amount the air could hold.
Humidity The measure of the amount of water vapor in the air.
Psychrometer Has two thermometers,a wet and dry bulb thermometer. The wet has a damp cloth over it. Air is blown over both.
Condensation The process by which molecules of water vapor in the air becomes liquid water.
Dew Point The temperature at which condensation begins.
Cumulus Heap or mass; white fluffy clouds.
Stratus spread out; clouds that form in flat layers.
Cirrus Wispy, feathery clouds.
Precipitation Any form of water that falls from clouds and reaches the surface.
Rain The most common form of precipitation;little water droplets.
Sleet Frozen ice rain that freezes in air.
Hail Round pellets of ice that is larger than 5 inches in diameter.
Snow Water vapor in a cloud that gets converted to snowflakes.
Rain Gauge An open-ended can or tube that collects rainfall.
Droughts Long periods of unusually low precipitation.
Created by: turtle12130
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