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Air is a mixture of: 78.08% nitrogen 20.95% oxygen 0.94% argon 0.039% carbon dioxide 0.00123% neon 0.0005% helium 0.000185% methane 0.000114% krypton 0.000055% hydrogen 0.000006% xenon ![]() Earth's atmosphere seen from NASA's space shuttle Our Atmosphere shields us from cosmic radiation which is harmful for humans! ![]() Air envelops the Earth and makes life possible. Humans breathe in about 35 pounds of air everyday! |
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![]() Many air molecules build up air pressure Air around our Earth is called atmosphere. The air-layer closest to the earth is the troposphere where invisible chemical cycling of essential elements takes place, as well as the uneven heating of Earth’s surfaces that creates our weather. The air of the troposphere is made up of gases with several other natural ingredients. ![]() Some of air’s gases remain fairly constant. Nitrogen, oxygen and argon make up the chief of these gases at approximately 78, 21, and 1 percent by volume. Small amounts of water vapor, carbon dioxide, methane, nitrogen dioxide and sulfur dioxide are also part of our air. All of these bits of matter play an important role in our weather by providing surfaces for condensation and eventually, precipitation, allowing water that evaporates from the ocean and land to rejoin us on the Earth’s surface. Additionally, rain and other forms of precipitation wash some of these particles down to the Earth’s surface. Nitrogen (N2) is one of the most common elements that makes up our air and earth. Almost ten pounds of molecular nitrogen occurs over every square inch of the earth’s surface, and yet this is still only 2 % of all nitrogen on, in or above the earth. The remaining 98 percent occurs in the rocks of the earth’s crust and mantle, or in tissue. Oxygen (O2) is important to most living organisms, for it allows food to be "burned" for energy on a cellular level (respiration). When this burning occurs, the oxygen combines with carbon to form carbon dioxide(CO2) which rejoins the atmosphere. An additional use of oxygen is for any extra cellular burning, whether it is during a forest fire, in the combustion engine or at the local power plant. Green plants, in addition to respiring, photosynthesize when exposed to sunlight. Photosynthesis involves taking CO2 out of the air and converting it to a carbon-based sugar, releasing O2 in the process. The air picture is not quite complete without argon and sulfur oxides. Argon is a colorless, odorless, tasteless gas. Sulfur oxides enter the atmosphere from sea spray, from volcanic action, and as a result of biological decay. So you can see: Air is more than just air - most of all living being need it. When we produce air pollution ![]() we lower the quality of our air. If air pollution gets too high humans get sick or die.
Humans and all mammals need healthy air to survive! | ![]() Air and water vapor = clouds |
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Members of Bear Springs Blossom Nature Conservation Group Inc. have a great mission: Information and Education for all who are interested in Nature conservation. We have only this one little planet EARTH to live on! Let's take care of it, save it for the next generation. BSBNCG is an international charitable non-profit-Organization 501(c)(3) Nature education online - B+S+B offers update Nature education online! Think about and see how wonderful our Earth was created.. Live in Harmony with Nature + Learn to understand Nature! |