Movimientos Corporales

Andrea Alessi Barajas Alanís/ A01176027
Environmental Systems/ Miss Marcela Valero
October 23, 2012
1. With a diagram describe how troposphere and stratosphere differ. Why the ozone layer isimportant?
Troposphere | Stratosphere |
It is the layer of the atmosphere that touches the Earth. | It is about 50 kilometers from the surface of the earth. |
Its temperature decreases by 6.5degrees Celsius for every kilometer away from the earth’s surface. | Its temperature is about -50 degrees Celsius where it is closest to the earth. |
Contains 75% of the atmosphere’s mass, water vapors,and aerosols. | Contains Ozone |
* The ozone layer is important because it protect us from the ultraviolet rays, which damage our skin.

2. List and briefly describe five natural factorsthat help to reduce outdoor air pollution and six natural factors that help to worsen them.
* 5 natural factors to reduce outdoor air pollution
1. Rain and snow help cleanse the air
2. Saltysea spray from the oceans washes pollutants out from air.
3. Particles heavier than air settle out as a result of gravitational attraction to earth.
4. Winds sweep pollutants away by mixingthem with cleaner air.
5. Some pollutants are removed from chemical reactions.
* 6 natural factor that increase outdoor air pollution
1. Urban buildings can slow wind speed.
2. Hightemperatures promote chemical reactions leading to photochemical smog
3. Grasshopper effect.
4. Hills and mountains can reduce flow of air.
5. Emissions of VOCS from certain trees and plantsmake photochemical smog.

3. Describe the warming and cooling of the atmosphere that has occurred over the past 900,000 years and during the last century.
For the past 900,000 years thetemperature of the atmosphere has gone through changes as in some years the cold periods come with thick glacial ice, which cover much of the surface. Each of the cold periods is followed by a warmer one...