![]() ![]() Note also that answer b, 'Life exhales gas that warms up the atmosphere,' is partly true. ![]() Variations in the tilt and orbit of Earth do affect how much solar radiation reaches the Earth, and this is one of many natural variations in our climate system. Note that answer c, 'The tilt of the Earth changes the amount of solar energy the Earth receives,' is also true, but is not related to the greenhouse effect. ![]() Without this natural greenhouse effect, the Earth's average temperature would be below freezing! These gases can have potent effects even in small quantities. Gases that trap heat are called greenhouse gases and they include water vapor, carbon dioxide, methane, and nitrogen oxides. The greenhouse effect is somewhat like a blanket that retains your body heat and keeps you warm. Certain gases in the atmosphere have the ability to absorb radiation that would otherwise escape into space. The greenhouse effect is a natural phenomenon. Reuse: This item is offered under a Creative Commons Attribution-NonCommercial-ShareAlike license You may reuse this item for non-commercial purposes as long as you provide attribution and offer any derivative works under a similar license. ![]()
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