1. Impact on Climate

2. Scientists believe carbon dioxide, CO2, is responsible for global warming.

3. Events, such as volcanic eruptions and clear cutting of trees in the rainforest, can have global effects on weather patterns and climate throughout the world.

4. Scientists theorize that global warming would cause higher ocean levels and global freezing would cause lower ocean levels.

5. The Milankovitch Theory is one of the major theories that explain how an ice age on Earth could have occurred.

6. The Milankovitch Theory suggests that the earth wobbles slightly as it orbits around the Sun and causes a varied difference in the distance the earth is from the sun. The change in distance causes more or less radiation/heat during different periods of time.

7. According to the Milankovitch, lower temperatures occur when the earth is farther away from the sun. These lower temperatures caused an ice age.

8. Scientists theorize that large volcanic activity can create dust clouds that block the sun and create cooler temperatures on Earth.

9. The Greenhouse Effect is the natural heating of a planet where gases in the atmosphere of a planet trap thermal energy (heat).

10. Scientist theorize that pollution by humans has increased the Greenhouse Effect on Earth causing Global Warming.

11. List possible reasons why the Earth has experienced ice ages in the past. asteroids volcanoes solar flares Milankovitch Theory

12. The ozone layer shields the earth from the sun’s harmful radiation.

13. The chemical composition of ozone is three atoms of oxygen and written as O3.

14. There is a hole in the ozone layer over the South Pole.

15. The release of Chlorofluorocarbons (CFC) into the atmosphere has caused the hole in the ozone layer to form.

16. Chlorofluorocarbons (CFC) have been used in aerosol sprays, refrigeration, air conditioners, foams, cleaning solvents, and electrical components.

17. Because of the damage to the ozone layer, Aerosol sprays are now banned in the United States and Europe.