what is green house effect?

Answer 1

The greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere (water vapor, carbon dioxide, nitrous oxide, and methane, for example) trap energy from the sun. Without these gases, heat would escape back into space and Earth’s average temperature would be about 60ºF colder. Because of how they warm our world, these gases are referred to as greenhouse gases.

Answer 2

The Earth receives energy from the Sun in the form of radiation. To the extent that the Earth is in a steady state, the energy stored in the atmosphere and ocean does not change in time, so energy equal to the incident solar radiation must be radiated back to space.

Radiation leaving the Earth takes two forms: reflected solar radiation and emitted thermal infrared radiation. The Earth reflects about 30% of the incident solar flux; the remaining 70% is absorbed, warms the land, atmosphere and oceans, and powers life on this planet. Eventually Earth, as a warm object, radiates this energy into space as black-body radiation, which maintains a thermal equilibrium. This thermal, infrared radiation increases with increasing temperature. One can think of the Earth's temperature as being determined by the requirement that it produces the infrared flux needed to balance the absorbed solar flux.


Solar radiation at top of atmosphere and at Earth's surface.The key to the greenhouse effect is the fact that the atmosphere is relatively transparent to visible solar radiation but strongly absorbing at the wavelengths of the thermal infrared radiation emitted by the surface and the atmosphere. The visible solar radiation heats the surface, not the atmosphere. Whereas most of the infrared radiation escaping to space is being emitted from the upper atmosphere, not the surface. The infrared photons emitted by the surface are mostly absorbed by the atmosphere and do not escape directly to space.

i hope u got the answer.!!!!!

Answer 3

The greenhouse effect, first discovered by Joseph Fourier in 1824, and first investigated quantitatively by Svante Arrhenius in 1896, is the process in which the absorption of infrared radiation by an atmosphere warms a planet. In the case of the Earth, without these greenhouse gases, its surface would be up to 30°C cooler. The name comes from an incorrect analogy with the way in which greenhouses are heated by the sun in order to facilitate plant growth. In addition to the Earth, Mars, Venus and other celestial bodies with atmospheres (such as Titan) have greenhouse effects.

In common parlance, the term "greenhouse effect" may be used to refer either to the natural greenhouse effect, due to naturally occurring greenhouse gases, or to the enhanced (anthropogenic) greenhouse effect, which results from gases emitted as a result of human activities (see also global warming, scientific opinion on climate change and attribution of recent climate change).

Answer 4

Greenhouse effect is caused by the absorption of infrared radiation by molecules in the atmosphere which have infrared active bonds. In order for a bond to be infrared active, it must be polar (note the entire molecule does not have to be polar, but the bonds must be). Thus, the three largest components of air (nitrogen, oxygen, and argon) do not contribute to the greenhouse effect. Other components of air, such as carbon dioxide, water vapor, and methane, do absorb infrared radiation. If it were not for this effect, a large portion of the heat hitting the earth from the sun would not be trapped by the atmosphere, and Earth's average temperature would be about -60 degrees Fahrenheit.

Answer 5

Illustrated here: (By the EPA - Environmental Protection Agency)

http://epa.gov/climatechange/kids/greenhouse.html

Greenhouse gases in the atmosphere behave much like the glass panes in a greenhouse. Sunlight enters the Earth's atmosphere, passing through the blanket of greenhouse gases. As it reaches the Earth's surface, land, water, and biosphere absorb the sunlight’s energy. Once absorbed, this energy is sent back into the atmosphere. Some of the energy passes back into space, but much of it remains trapped in the atmosphere by the greenhouse gases, causing our world to heat up.

Answer 6

The build up of carbon monoxide and carbon dioxide in the atmosphere produce a shield that prevents light and heat from escaping. So over time the heat with accumulate on earth and melt polar ice caps and increase global temperatures.

Answer 7

due to atmospheric pollution many harm full gases generated ,in these gases CO (carbon mono oxide),Sulfur Di oxide etc exist. due to these gases a sphere is made around the earth this sphere is works as a heat insulator ,thus the heat or temperaturee does not go towards sky therefore the temperatur of earth atmosphere increases.

Answer 8

the greenhouse effect is caused due to the trapping of green house gases such as methane,carbon di oxide,cfc etc..this is increases the temp. of the surrounding...it is useful for growing vegetables.but it has other disadavantages aloso.

Answer 9

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Answer 10

no idea