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Science- Chapter 15

Earth's changing atmoshere.

QuestionAnswer
atmosphere A layer of air that surrounds Earth.
altitude Distance above sea level.
density The amount of mass in a given volume.
cycle Processes that repeat over and over again. Three examples are the Nitrogen, Carbon, and water cycles.
radiation Energy that is emitted by on object, travels through a medium or space, and is then absorbed by another body.
conduction The transfer of heat energy from one substance to another through direct contact.
convection The transfer of energy through the movement of a gas or liquid.
troposphere The layer of the atmosphere closest to Earth's surface, and exists between sea level and six miles above it.
stratosphere This is where the ozone layer is. It exists from 6-31 miles above sea level.
mesosphere This layer makes up less than 0.1% of the atmosphere, and is where most meteors burn up. It exists between 31-56 miles above sea level.
thermosphere The last layer of the atmosphere, which slowly fades into outer space. It exists 56 miles above sea, level.
ultraviolet radiation This radiation can cause sunburns and other damage. It contains more energy than the light that you see.
infrared radiation This radiation warms the materials that absorb it. It contains less energy than the light that you see.
ozone O3, a molecule that consists of three oxygen atoms.
air pollution Smoke and other harmful materials that are added to the air.
particulate Tiny particles that are mixed with the air.
fossil fuel Fuels that formed from the remains of prehistoric animals and plants.
smog The combination of smoke and fog.
Created by: htawrew13
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