Across
- 1. big dark thunderstorm clouds
- 4. when a fluid is heated, the warm air will rise and the cold air will sink
- 5. winds and currents moving because of earths spin
- 7. lower part of thermosphere, where ion particles are found
- 8. the uppermost layer in the atmosphere, temperature increases as altitude increases
- 10. weather system that usually brings stormy weather and clouds
- 12. also known as london smog, burning coal causes it
- 14. 2nd layer in atmosphere, ozone is found here which protects us from UV
- 15. this brings a slight breeze and clear weather
- 17. the outermost layer, goes out into space
- 18. first layer of the atmosphere, where weather is found
- 19. feathery, wispy-looking clouds that form at high altitudes and are made of ice crystals
- 20. white, cotton-like clouds
- 21. differences in air pressure causes air to move
Down
- 1. the process from a gas to a liquid
- 2. goes down as you move up in altitude
- 3. a dark fog that is a mixture of chemicals and pollutants
- 6. 3rd layer in atmosphere, coldest, protects us from meteors
- 9. a mixture of gases that surround our planet
- 11. cloud that covers most of the sky, can expect a mist or drizzle
- 13. low lying dark clouds that cause some precipitation
- 16. latin root word is "middle"