Across
- 4. Chemicals in the atmosphere that are harmful to living things
- 6. When the sky has no clouds
- 7. a line connecting equal points of pressure
- 9. the shaking of a portions of earths surface
- 10. a period when a region has a lack of rainfall
- 11. a boundary between two air masses, one cold and the other warm, moving so that the colder air replaces the warmer air
- 14. a water substance in a solid form
- 15. An instrument that measures weather speed
Down
- 1. the process of changing a liquid to a vapor
- 2. Light rain
- 3. An instrument that measures air pressure
- 5. The mixture of gases
- 8. a layer of gases surrounding a planet
- 12. a low pressure system
- 13. Light wind
