| Term | Definition |
|---|
| What causes water vapor to condense? | cooling |
| What happens when water vapor in the air cools? | it condenses onto dust and other tiny particles to form clouds or fog |
| What are the three types of clouds? | cirrus, cumulus, stratus |
| What is the water cycle?s | continuous movement of water through evaporation, condensation, and precipitation |
| What is evaporation? | the chance of liquid water to water vapor |
| What causes evaporation? | the heating of water by the sun |
| What is condensation? | the change of water vapor to liquid water |
| What kind of instrument is used to measure air pressure? | a barometer |
| What weather conditions does a high-pressure area usually bring? | cool, dry weather |
| What weather conditions does a low-pressure area usually bring? | warm, wet weather |
| What is the atmosophere? | the layer of air surrounding Earth |
| What is the lowest layer of the atmosophere called? | troposphere |
| Why is the troposphere so important? | most of Earth's weather occurs there |
| What is the layer above the troposphre? | stratosphere |
| Why is the stratosphere important? | it contains the ozone layer which protects life on Earth by absorbing Earth's harmful rays |
| What is air pressure? | the weight of air |
| What is humidity? | the amount of water in the air |
| Rain gauge | a rain guage measures the amount of precipitation |
| barometer | measures air pressure |
| thermomometer | measures air temperature |
| hygrometer | measures humidity |
| wind vane | shows the direction from which the wind is blowing |
| anemometer | measures wind speed |
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