Across
- 2. things that produce oxygen
- 4. bottom layer of the atmosphere
- 5. things like gas, oil, petroleum
- 6. gaseous form of water
- 8. living organisms on earth
- 11. what global warming is doing to sealevel
- 12. the protective layer in our atmosphere
- 13. gas that comes from animal products
- 16. process that makes oxygen in plants
- 18. a gas found in the greenhouse layer
- 19. second to bottom layer of the atmosphere
Down
- 1. produced by the burning of Fossil Fuels
- 3. meteorites burn in this layer
- 7. hottest layer of the atmosphere
- 9. the most abundant gas in our atmosphere
- 10. gas released from agriculture
- 14. first gas in the universe to exist
- 15. all of the gas that surrounds earth
- 17. measure of how hot or cold something is
- 20. makes up 21% of the gas in atmosphere