Across
- 5. the state of the air and atmosphere at a certain point in time
- 8. the movement of heat (energy) from the interior of Earth to the surface
- 9. the rigid outer part of the earth, consisting of the crust and upper mantle
- 11. a colorless odorless flammable gaseous hydrocarbon CH4
- 15. the total quantity or weight of organisms in a given area or volume
- 16. the total amount of greenhouse gases (including carbon dioxide and methane) that are generated by our actions
- 17. a colorless, odorless gas produced by burning carbon and organic compounds and by respiration
- 18. a long-term change in average weather patterns in a region
- 19. anything that absorbs more carbon from the atmosphere than it releases
Down
- 1. the envelope of gases surrounding the earth or another planet
- 2. the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water
- 3. the degree of hotness or coldness of an object
- 4. the long-term heating of Earth's surface observed since the pre-industrial period
- 6. weather in an area over a long period of time
- 7. fuel made from decomposing plants and animals
- 8. all the waters on the earth's surface, such as lakes and seas
- 10. the way in which heat is trapped close to Earth's surface by “greenhouse gases
- 12. gases in the earth's atmosphere that trap heat
- 13. the regions of the surface, atmosphere, and hydrosphere of the earth
- 14. any of the almost spherical concentric regions of matter that make up the earth and its atmosphere