| A | B |
|---|
| atmosphere | air that surrounds Earth |
| troposphere | the layer of gases closest to Earth's surface |
| air pressure | air pressing onto a surface |
| humidity | water vapor in the air |
| barometer | a tool that measures air pressure |
| convection | heat going from one place to another through movement of a gas or liquid |
| global wind | winds that blow around Earth in given directions over long distances |
| climate | the average weather conditions of a place |
| current | the ongoing movement of ocean water |
| air mass | a large amount of air that has similar temperature and humidity throughout |
| front | a meeting place between two air masses |
| thunderstorm | a rainstorm that includes lightning and thunder |
| tornado | a spinning funnel cloud that has winds up to 480 kilometers (299 miles) per hour |
| cyclone | a storm with low pressure at its center and spinnning winds |
| hurricane | a large spinning storm that has winds over 117 kilometers (73 miles) per hour |
| storm surge | a large rise in the height of ocean water caused by a hurricane |
| forecast | to make a guess about what may happen based on careful observation |
| weather map | a map that shows weather conditions over an area at a given time |
