Across
- 2. the layers of gases surrounding the planet
- 3. fuels that contain the carbon of plants & animals that died millions of years ago and were preserved
- 6. continuous movements of water in the ocean
- 8. all the liquid water on Earth's surface
- 10. periods between glaciations
- 12. the heating effect of the Earth's atmosphere
- 14. layer in the Earth's atmosphere that absorbs ultraviolet rays
- 15. the land masses on Earth
- 16. cycle where carbon is recycled through soil, water living things & the atmosphere
- 18. has the chemical equation CO₂
- 19. the preserved remains of things that were once living
Down
- 1. process where nitrogen travels between living and non-living environments
- 4. areas on Earth where the temperature in the layers of rock or soil never goes higher than freezing point
- 5. an environment that can sustain and support itself without outside influence or help
- 7. are circular patterns shown by ocean currents in ocean basins
- 9. day to day conditions of a particular place
- 11. is a time when the average temperature of the world is increasing
- 12. gases that trap heat close to the surface of the Earth
- 13. long-term averages of an areas weather conditions
- 17. all things that are living on Earth