Across
- 3. An underground layer of permeable rock that holds groundwater.
- 4. The border between an advancing cold air mass and a retreating warm air mass.
- 5. The boundary between an advancing warm air mass and a receding cooler air mass.
- 9. A tool that measures the amount of rainfall.
- 10. A tool that measures temperature.
- 11. The star at the center of the solar system that supplies heat and light to Earth: its enormous gravity keeps the solar system in orbit.
- 12. Change in state of matter from a gas to a liquid.
Down
- 1. The tool that shows wind direction.
- 2. Rain, snow, sleet, or hail that falls from clouds in the sky.
- 5. The current condition of the air outdoors, such as temperature, cloud cover, wind speed, and rainfall.
- 6. Change in state of matter from a liquid to a vapor or gas.
- 7. A natural or artificial place where water is collected and stored.
- 8. The constant movement of water through the land, air, oceans, and living things.