4SBS #14-20 pg 361

14. CO2 will block infrared light out and also keep the correct amount of UV and visible light entering the earth and if this balance is disrupted more heat will build up and reflect back creating a raised temperature.

15. a) The decay of plant life and animals will increase CO2 levels as well as cutting down trees and automobile emission
b) CH4 levels will increase when more cows emit methane and also more plants decay, methane is also emitted in fires.

16. a) Increased amounts of CO2 as well as more methane will cause an increase in temperature
b) An increase in ozone and less solar energy let into earth would decrease the temperature of the earth.

17. On a sunny winter day, a greenhouse with transparent glass walls is much warmer than is a structure with opaque wooden walls because the glass allows the visible and UV light to enter the greenhouse but the glass does not allow the reradiated infrared radiation leave the greenhouse, raising the temperature.

18. a)

b) http://earthguide.ucsd.edu/earthguide/diagrams/greenhouse/

19. Limestone, Fossil fuels, and Plant decay

20. A carbon atom that was in a decayed fish came into the ocean water, the water was used in the soil of a plant and the carbon that makes up the plant can be released when it decays then fossilized and gets pumped from an oil rig and used as petroleum gas in a car which then gets emitted into the atmosphere.