Climate Change

3. Increased the range of many pest insects
4. The study of intentionally and artificially changing natural processes of the Earth
5. The mixing of warm and cool salt water creates this combination of current
10. Permanent layers of ice covering a tract of land, especially in the polar regions
11. Frozen sea water that floats on the ocean's surface
12. Temperature is estimated by sampling air bubbles and ___?
13. Absorbs sunlight and scatters ultra violet radiation
14. The United Nations set up this panel to assess climate change
15. One of the main greenhouse gasses

1. The tendency of water to expand in volume as it warms.
2. This period took place between 950-1250 C.E.
6. Occurs when coral polyps eject the symbiotic algae that live with them under stressful environmental conditions
7. Wobbling of the Earth's axis is part of what cycle?
8. This proxy is used to measure the past atmosphere of Earth
9. The exploitation of a shared resource for individual benefit