| A | B |
|---|
| Ozone | Absorbs harmful UV radiation |
| Troposphere | The lowest layer of the atmosphere where weather occurs |
| Stratosphere | layer of the atmosphere where planes fly |
| mesosphere | middle layer of the atmosphere |
| Thermosphere | hottest layer of the atmosphere |
| Exosphere | uppermost layer of the atmosphere which extends to outer space |
| radiation | travels through waves from the Sun to Earth |
| conduction | process that allows heat to get into the atmosphere from Earth's surface |
| Convection | occurs because cold air is more dense than warm air |
| temperature | measurement of how rapidly or slowly move around |
| heat | the transfer of energy that occurs becuase of a difference in heat between substances |
| dew point | the temperature to which air must be cooled at to reach saturation |
| condensation | when gas becomes liquid |
| evaporation | when liquid becomes gas |
| transpiration | when water evaporates from the leaves of plants |
| lifted condensation level | the level of the troposphere where condensation occurs |
| temperature inversion | an increase in temperature within an atmopsheric layer because of the production of greenhouse gases such as carbon dioxide |
| humidity | the amount of water vapor in the air |
| relative humidity | the amount of water vapor in the atmopshere relative to what it can actually hold |
| condensation nuclei | particles around which clouds can form |
| orographic lifting | the process of cloud formation that occurs when an air mass comes into contact with a mountain |
| stability | the ability of an air mass to resist rising |
| latent heat | stored heat energy in a cloud that is released when the water condenses |
| coalescence | the comining of cloud droplets to make one larger droplet |
| precipitation | any form of water that falls from clouds |
| water cycle | the process of water falling to Earth's surface and then returning to the clouds |
