Climate Change

2. from 4.6 billion to 540 million years ago, the Earth’s atmosphere was mostly carbon dioxide and nitrogen.
4. Designed to reduce emissions and stabilize the levels of greenhouse gases already in the atmosphere.
7. darker areas on the sun’s surface created by intense magnetic fields.
8. thin layer of gases that surrounds the earth
11. Earth’s overall surface temperature is lowered enough that glaciers form at the poles and in mountainous areas.
13. hemisphere is facing the sun, about half of incoming solar radiation passes through the atmosphere and warms the Earth.
15. has a much thinner atmosphere, with no greenhouse effect.
17. very dry and less dense layer above the troposphere.
19. lasted between about 950-1250 C.E., with warmth in some regions exceeding the current post-industrial era.

1. adjusting our lives and society to the expected future climate.
2. weakened the greenhouse effect due to the removal of carbon dioxide and oxidation of methane.
3. do not change day-to-day
5. any permanent layers of ice covering a tract of land, especially in the polar regions.
6. contains the air that we breath and all aspects of weather
9. was a period of cooling that lasted from the 16th-19th centuries.
10. change in amounts depending on the seasons and other factors.
12. study of intentionally and artificially changing natural processes of the Earth.
14. the area between the stratosphere and upper troposphere, due to the similar temperatures
16. frozen seawater that floats on the ocean’s surface.
18. they absorb and retain carbon dioxide from the atmosphere