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Science7 chapter 3

TermDefinition
weather The condition of the earth’s atmosphere
Atmosphere Layers of gases that surround the planet
Water vapor Water in a form of a gas
Density The amount of mass in a given volume in the air
Air pressure The result of the weight of a column of air pushing on an area
Barometer It measures pressure
Mercury barometer A tool to measure air pressure that uses mercury to help measure it
Aneroid barometer A tool to measure air pressure that uses a metal chamber that’s sensitive to changes to air pressure
Altitude The distance from sea level
Troposphere The lowest layer of the atmosphere
Stratosphere The second layer of the atmosphere
Mesosphere The middle layer of the atmosphere
Thermosphere The last layer of the atmosphere
Ionosphere The first layer of the Thermosphere
Exosphere The last layer of the Thermosphere
Electromagnetic waves A kind of energy that is able to move through a space vacuum
Radiation The direct transfer of electromagnetic waves
Infrared radiation A form of electromagnetic waves that are longer than red
Ultraviolet radiation Invisible form energy with wavelengths that are shorter than violet
Scattering A process of particles and gases disperse in light in the atmosphere
Greenhouse effect The gases that hold heat in the earth’s atmosphere
Temperature Average amount of energy of motion
Thermal energy Measures the total energy of motion
Thermometer Measures temperature
Heat Thermal energy transferring from a hot object to a colder one
Convection The transfer of heat by the movement of fluids
Conduction The transfer of heat from substances in direct contact
Convection currents The upward movement of warm air and the downward movement of colder air
Wind Flow of air
Anemometer Measures wind speed
Windchill factor The increased cooling that a wind can cause
Local winds Winds that can blow over short distances
Sea breeze Local wind that blows from a body of water
Land breeze The flow of the air from the land to a body of water
Global winds Winds that blow over long distances
Coriolis effect The way Earth’s rotation makes winds curve
Latitude Distance from the equator measured in degrees
Created by: sieraand