Across
- 8. hottest layer; aurora borealis occur here (436)
- 9. boundary between troposphere and stratosphere; jet streams are here(433)
- 10. envelope of gases that surrounds the earth (429)
- 11. Van Allen discovered this region in exosphere in 1958 (442)
- 14. __ and hydrogen are light gases in space
- 15. outermost layer; space (436)
- 17. chlorofluorocarbons; freon is an example; thought to deplete ozone (441)
- 18. uniform mixture of gases; troposphere-mesosphere (433)
- 20. Day of Creation in which "great expanse" was created (430)
- 21. rate of flow of energy (8 min) from sun through space (445)
Down
- 1. region in thermosphere that reflects radio waves (442)
- 2. steady change of temperature every km in altitude (433)
- 3. most abundant gas in our atmosphere; needed for proteins (433)
- 4. uneven mixture of gases in thermosphere and exosphere (433)
- 5. where true space begins in thermosphere 100 km (notes)
- 6. lowest layer of atmosphere; life and clouds (433)
- 7. fixates nitrogen in atmosphere (438; bottom paragraph)
- 12. OE scientists believe this is what all life came from (430)
- 13. middle layer; also coldest layer; meteoroids burn here (435)
- 16. second layer of atmosphere; jet streams are near here at tropopause
- 19. part of stratosphere that shields earth from harmful UV radiation (439)