Why do we need atmosphere

This dramatically increased oxygen levels , Frey told Live Science. Nowadays, Earth's atmosphere consists of approximately 80 percent nitrogen and 20 percent oxygen, Frey said.

That atmosphere is also home to argon, carbon dioxide, water vapor and numerous other gases, according to the National Center for Atmospheric Research NCAR. It's a good thing these gases are there.

Our atmosphere protects the Earth from the harsh rays of the sun and reduces temperature extremes, acting like a duvet wrapped around the planet. Meanwhile, the greenhouse effect means that energy from the sun that reaches Earth gets waylaid in the atmosphere, absorbed and released by greenhouse gases, according to the NCAR. All weather takes place in the atmosphere, virtually all of it in the lower atmosphere. Weather describes what the atmosphere is like at a specific time and place, and may include temperature, wind, and precipitation.

Weather is the change we experience from day to day. Climate is the long-term average of weather in a particular spot. Although the weather for a particular winter day in Tucson, Arizona, may include snow, the climate of Tucson is generally warm and dry.

Ozone is a molecule composed of three oxygen atoms, O3. Ozone in the upper atmosphere absorbs high-energy ultraviolet UV radiation coming from the Sun. Reasons why the atmosphere is useful The atmosphere protects Earth from harmful solar radiations and regulates heating provided by the Sun.

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What it is Atmosphere Atmosphere layers Origins of the atmosphere Reasons why the atmosphere is useful The study of the atmosphere What it is Atmosphere. The uppermost layer, that blends with what is considered to be outer space, is the exosphere. Also called a shooting star or falling star. The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit. The Rights Holder for media is the person or group credited.

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