Across
- 8. evolved the ability to perform photosynthesis
- 9. thin layer of gases that surrounds the earth.
- 10. involves adjusting our lives and society to the expected future climate
- 13. frozen seawater that floats on the ocean’s surface.
- 14. permanent layers of ice covering a tract of land
Down
- 1. the area between the stratosphere and upper troposphere
- 2. darker areas on the sun’s surface created by intense magnetic fields.
- 3. weakened the greenhouse effect
- 4. main proxy
- 5. was chosen to avoid the influences of large forests or cities
- 6. very dry and less dense layer above the troposphere
- 7. The area of greatest warming has been in the
- 11. contains the air we breathe and every aspect of what we call weather.
- 12. In 1988, the United Nations set up the
- 15. The number of sunspots fluctuates from a maximum to minimum number every