a. A greenhouse gas is a gas, which absorbs the infrared radiation emitted out by a planet carrying energy away, but allows through the visible light carrying energy in from the Sun, such as carbon dioxide. (CO2, H2O, O3, CH4, CFCs).
b. Because the Sun has a surface temperature of about 5,800 Kelvin, it emits most of its energy as visible light. Because the Earth has a much lower average surface temperature of about 288 Kelvin, it emits most of its energy as infrared light. Greenhouse gasses are transparent to visible light, but partially block infrared light. Greenhouse gasses act like one-way valves, because they allow energy from the Sun to reach the surface as visible ...view middle of the document...
c. The reason for such thick and heavy clouds is directly related to the volcanic activity. The high volcanic activity leads to a higher concentration of clouds, and thus the heavier atmosphere. If the cloud atmosphere were to disappear than there would no longer be high volcanic activity in fact the most likely result from disappearance of clouds would be that the volcanoes on Venus had become dormant.
3) Mars Climate Evolution
a. So far, we do not yet have clear scientific evidence of organisms on Mars. Run off channels observed on the surface of Mars show that in the past there was probably liquid water on the surface. The evidence of Liquid water leads us to believe that Mars once had much higher temperature and pressure than today.
b. Part of the reason that Mars no longer has an atmosphere is because there used to be volcanoes that would create clouds of gas that would trap gasses and chemicals within the atmosphere.
c. It is not likely that Mars will have a thicker and warmer atmosphere at some point in the future because there is no way that gasses can be trapped in order to...