Across
- 4. the level that water goes to in the ocean
- 6. long and short wave
- 8. the place where the ozone is
- 9. the first layer of the lithosphere
- 10. when the globe gets too cold and freezes
- 11. the carbon cycle is described as a
- 13. where all the gases are
Down
- 1. carbon dioxide methane
- 2. comes from cows
- 3. one of the biggest natural sources of carbon
- 5. when a forest burns
- 7. the effect of a thing
- 9. a fossil fuel
- 12. dioxide