Across
- 3. this gas is vital to humans and to most animal life
- 6. coldest point in the atmosphere
- 8. the atmosphere_____the earth from harmful radiation given off by the sun
- 11. this layer of the atmosphere has strong, steady winds but few changes of weather
- 12. another name for upper atmosphere
- 14. the outermost layer of the atmosphere
- 15. scarce type of oxygen molecule in which three oxygen atoms are bonded are bonded together
Down
- 1. carbon dioxide and water vapor help give the earth a mild and stable ______
- 2. as altitude increases, air pressure ___
- 4. this layer of the atmosphere is characterized by high temperatures
- 5. upper boundary of the trophosphere
- 7. this gas is vital to plants
- 9. the blanket of gases that surrounds our planet
- 10. the weather layer of the atmosphere
- 13. another name for lower atmosphere