Across
- 4. a cell structure that carries out tasks
- 6. when gas changes to a liquid
- 9. 3rd layer where meters burn up
- 11. the lowest layer of the earth
- 14. puffy clouds
- 17. the condition of earths atmosphere
- 18. wispy clouds
- 19. dark cloud ; means rain is coming
- 20. when water changes from a liquid to a gas
- 21. the outermost layer of the earth
Down
- 1. a organelle only found in plants
- 2. prefix for mid level clouds
- 3. a cell organelle that stores materials
- 5. outside layer of the thermosphere
- 7. control center of the cell
- 8. The envelope of gases around the earth
- 10. clouds that form in flat layers
- 12. putting harmful things into the earth
- 13. the amount of water vapor in the air
- 15. the second lowest layer of the earth
- 16. the transfer of heat by movement