Across
- 4. caused by electrically charged particles from space entering the upper atmosphere at a very high speed
- 5. rays from the sun that are harmful to humans
- 8. the infinite layer
- 9. layer where weather takes place
- 11. layer that contains the ozone
- 13. as altitude increases in the mesosphere it has a
- 14. pressure the pressure within the atmosphere
- 15. how humans impact the air through transportation
- 18. composed of three oxygen atoms
- 19. what happens to the temperature in the troposphere
- 20. the envelope of gases surrounding the earth
- 21. what happens to the temperature in the stratosphere
- 23. the gaseous phase of water
- 24. a gas that traps heat and absorbs radiation in the atmosphere
Down
- 1. produced through photosynthesis
- 2. rays from the sun that are not harmful to humans
- 3. keeps our planet livable by trapping heat
- 6. the hottest layer
- 7. the main component in natural gas that is highly flammable
- 10. forms about 78% of earth's atmosphere
- 12. how humans impact the air through production
- 16. layer that contains a high concentration of ions
- 17. as altitude increases in the thermosphere it has a
- 19. how compact a substance is
- 22. layer where meteoroids burn up