B.3 UNIT 4 1-4

1.Why is human exposure to ultraviolet radiation potentially more harmful than exposure to inferred radiation?

Infrared causes only certain atoms to vibrate, and not even that much. But UV radiation causes all atoms to vibrate which causes sunburns, and may even cause skin cancer at long exposers

2.Describe two essential roles played by visible solar radiation

One role that visible solar radiation plays is that it provides energy need for photosynthesis. And it also energizes electrons in some chemical bonds.

3.Explain why dry arid region in the United States, such as New Mexico and Arizona, experience wider air- temperature fluctuation from night to day than do states with more humid conditions such a Florida

In dry air regains the suns solar energy is absorbed, and where there are more humid places the solar energy gets absorbed in the clouds. In dry climates very few water molecules trap the radiation, unlike in florida where there are many water molecules, which trap the radiation, making 

4.Suppose Earth had a less dense atmosphere (fewer fas molecules) than it does now

a.How would average daytime temperatures be affected? Why? It would be warmer because there is no layer of CO2 or gaseous H2Oto absorb the light, making more of the light be able to go through

b. How would average nighttime temperature be afftted? why? It would be lower because there are no molecules holding onto the radiation

14. describe how atmospheric CO2 and water vapor help maintain moderate temperatures at Earth's surface?

The CO2 absorbs most of the heat, making allowing less of the heat to reach earth surface.

15. List two natural processes and two human activities that can increase the amount of

a. CO2 in the atmosphere

Any using up fossil, driving a car

b. Ch4 in the atmosphere

The cows burping, their gas contains methane

16.What changes in the composition of the atmosphere would cause the average surface temperature of the Earth to

a. Increase? CO2 and HO gases

b. Decrease? Less CO2 and H2O gases

17. Explain why, on a sunny winter day, a greenhouse with transparent glass walls is much warmer than a structure with opaque wooden walls.

The greenhouse, when the sunlight goes in throughout the glass it gets locked in there, there is no way of escaping.

18. Look at drawing

19. List three chemical reservoir of carbon atoms.

Atmosphere
sold carbonate
calcium

20. Explain how, over time, a particular carbon atom can be part of the atmosphere, biosphere, lithosphere, and hydrosphere

With all this pollution in the world, there is a lot of carbon released from non-hybrid cars, ect. So when there is a lot of carbon dioxide atoms are in the atmosphere, it will get into different layers.