Across
- 5. composed of mostly nitrogen and oxygen
- 6. solar radiation ionizes gas molecules in this layer in the thermosphere
- 7. most abundant atmospheric gas
- 9. a planet absorbs more energy from the sun than it can radiate back into space
- 16. houses ozone layer
- 18. greenhouse gas used in medicine
- 20. a greenhouse gas in which too much can deplete the ozone layer
- 22. air above the earth's surface that is essential for life on earth
- 23. most abundant greenhouse gas
- 24. a type of agriculture that is a human activity that releases methane into the air
- 25. natural production comes from biological materials in the carbon cycle
Down
- 1. second most abundant atmospheric gas
- 2. human activity that releases methane into the air
- 3. comes from emission of livestock and agriculture
- 4. gases that absorb infrared radiation
- 8. warming of the surface & atmosphere
- 10. the most potent and longest lasting greenhouse gases emitted by human activities
- 11. formed by the interaction of the solar wind with earth's magnetic field
- 12. hottest layer in atmosphere
- 13. a boundary between two spheres
- 14. coldest layer in atmosphere
- 15. the early gases came from the outgassing of this
- 17. releases greenhouse gases into the air
- 19. the greenhouse effect causes this to emit in all directions
- 21. a colorless odorless reactive gas composed of three oxygen atoms