| A | B |
|---|
| air pressure | The weight of the air pushing against the earth |
| anemometer | a tool that is used to measure wind speed |
| atmosphere | the layer of air that surrounds the earth |
| barometer | a tool to measure air pressure |
| rain gauge | a container that catches rain during a storm and is used to measure how much rain falls |
| temperature | a measure of how hot or cold matter is |
| thermometer | a tool used to measure temperature |
| water cycle | the path that water follows as it leaves the earth, goes into the air, and returns to the earth |
| evaporation | process that water takes when it changes from a liquid to a gas |
| condensation | process that water takes when it changes from a gas to a liquid |
| weather | the condition of the air at a certain time and place |
| wind | moving air |
| wind vane | a tool that is used to show the direction in which the wind is moving |
| absorb | what happens to energy, such as heat, that strikes matter and is taken in by matter |
| reflect | what happens to energy, such as heat, that strikes matter and bounces back from matter |
| frost | tiny drops of water frozen on a surface, making a cold, white covering like ice or snow |
| rain | water falling in drops from the sky |
| precipitation | the moisture that falls to the ground in the form of rain, snow, sleet, or hail |
| clouds | white or gray masses in the sky made up of tiny drops of water |
| fog | a cloud of fine drops of water just above the ground that are thick and white and sometimes impossible to see through |
| lightning | a flash of electricity in the sky |
| tornado | a strong, whirling wind that destroys whatever it touches |
| hurricane | a fierce storm with heavy wind and very heavy rain |
