| A | B |
|---|
| atmosphere | the layer of air that surrounds the earth that supports and protects life |
| cycle | a series of events or actions that repeat themselves regularly |
| radiation | energy that travels across distances in the form of certain types of waves |
| conduction | the transfer of heat energy from one substance to another by direct contact |
| convection | the transfer of energy from place to place by the motion of a fluid (gas or liquid) |
| ozone layer | a part of the atmosphere that protects life on Earth by absorbing harmful ultraviolet radiation from the Sun |
| greenhouse effect | a process where certain gases in a planet's atmosphere absorb radiation resulting in an increase in surface temperature |
| air pressure | the force of air molecules pushing on an area |
| wind | the horizontal movement of air caused by differences in air pressure |
| weather | the condition of the Earth's atmosphere at a particular time and place |
| Coriolis effect | the influence of the Earth's rotation on objects moving on it |
| evaporation | the process by which liquid changes into gas |
| condensation | the process by which gas changes into a liquid |
| precipitation | any type of liquid or solid water that falls to Earth's surface, such as rain, sleet, snow, or hail |
| air mass | a large volume of air that has nearly the same temperature and humidity at different locations in the same altitude |
| high pressure system | a generally calm and clear weather system |
| low pressure system | a large and often stormy weather system that often forms where air masses meet |
