It makes up about 21% of the air we breathe
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The Air We Breathe  What is in the air that we breathe? ... Atmosphere is 21% oxygen = 210000 L per 1000000 L of air .... The fact that elemental composition (chemical make up).
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Which elements make up the air we breathe? | Reference.com  Air is made up of oxygen, nitrogen and carbon dioxide. It consists of approximately 78 percent nitrogen, 20 percent oxygen and trace amounts of carbon...
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The air we breathe - Bo-Tau  The air you breathe comprises three main gases. The largest proportion ... making up 21 percent and carbon dioxide just 0.03 percent. Once it has found its way...
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What is the gas that makes up about 21 percent of the atmosphere ...  What are the ingredients in the air we breathe? A: The air humans breathe is made up of about 78 percent nitrogen, 21 percent oxygen, and 1 percent carbon...
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What is Air Made Of? - Your Lungs and Breathing - Explore Your ...  The air you breathe is made up of lots of other things besides oxygen! Oxygen only makes up about 21% of air. About 78% of the air you breathe is made up of...
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The atmosphere - Natural Sciences Grade 9  Photograph of the Earth's atmosphere taken from the International Space Station. ... As you move further and further away from the surface of the Earth, the gas molecules ... Each layer of the atmosphere has a different temperature gradient, in other ..... 0,03%. 95%. Nitrogen (N2). 3,5%. 78%. 2.7%. Oxygen (O2). Trace. 21%.
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Chemistry - Ray Sahelian, M.D.  Air consists of 78% nitrogen, 21% oxygen and about 1% the noble gas Argon. Alkali lye ..... Coal The Greek & Latin words for this fuel were "anthrax" & "carbo".
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Some questions on Atmosphere - WikiEducator  Feb 17, 2015 ... Q. How much of the earth's air is found in the atmosphere inner most layer (troposphere) ... extend beyond the lowest the region of atmosphere ie.troposphere? ... It happens when a layer of cold air is trapped by warmer upper air mass. ... in mesosphere which extends from 50 km to an altitude of 80 km ?
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Jeopary Questions page 2183 - IN THE MINORITY - TriviaBistro.com  IN THE AIR UP THERE: About 80% of this gas in the air comes from decomposition in rice paddies, swamps, and animal intestines  ON THE BOARDS: A city in...
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Page 1  | PERIOD: D^* 2 NAME: - NOVA: Hunting the Elements 1 ...  When copper is combined with another element, t n , it makes bronze, the first ... The oxygen that powers all those explosions makes up 2-\ } of our atmosphere. ... six CHNOPS elements make up 97% of the weight of his body, but what about th ... In total, the human body uses more than 25 elements in ways and quantities...
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Multiple Choice Exam Questions Chapter 1  The most abundant gases in the earth's atmosphere by volume are: ... This holds a planet's atmosphere close to its surface: ... The rate at which temperature decreases with increasing altitude is known as the: ..... c. mix the air near the ground d. all of ... b. the sun is higher in the sky and we receive more direct solar radiation.
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Composition of the Atmosphere | CK-12 Foundation  Nitrogen and oxygen together make up 99% of the planet's atmosphere. Nitrogen makes up the bulk of the atmosphere, but is not involved in geological or...
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The Troposphere - Windows to the Universe
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Molecules of the Atmosphere Composition of the Atmosphere  The present atmosphere consists mainly of molecular nitrogen (N2) and molecular ... Over time, the excess oxygen has built up so that it is now makes up nearly 20% ... is present as 5.0 x 102/109 or only 0.00000050, 0.000050% of all gas particles. ... Molecular nitrogen makes up 78% of the gases in the atmosphere.
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The Ozone Hole  Each spring in the stratosphere over Antarctica (Spring in the southern ... As winter arrives, a vortex of winds develops around the pole and isolates the ... Over the course of two to three months, approximately 50% of the total column amount of ozone in the atmosphere disappears. At some levels, the losses approach 90%.
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Lungs and Respiratory System - KidsHealth  Oxygen is the most important for keeping us alive because body cells need it for energy and growth. ... Carbon dioxide is the waste gas that is produced when carbon is combined ... The lungs and respiratory system allow oxygen in the air to be taken into the ... Tiny hairs called cilia (pronounced: SIL-ee-uh) protect the nasal...
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Respiratory Basics  Answers - Your Nursing Tutor  Why do you think that one side has fewer lobes than the other? There are 5 lobes in the lungs: 2 on the left, and 3 on the right. ... The nose warms the air you breathe, humidifies the air, and filters out particles such as dust and bacteria. These three things all help to protect the lower airway from irritation and contamination.
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BBC - Standard Grade Bitesize Biology - The need for energy ...  The air sacs (alveoli) have a very large total surface area and a very good ... These four features are particularly important to our lungs efficient for gas exchange. ... Thin - the air sac walls are very thin so that gases can quickly diffuse through them. ... Test out your knowledge of biology with Mia Cadaver's biology game - it's...
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About 85% of People Only Breathe Out of One Nostril at a Time  Mar 17, 2010 ... Another study in 1993 showed that when you are breathing through your right ... begin to swell up and the other side will decrease its swelling so that if you .... Sages, even they knew lot more than that, they used to do meditation on .... breathing out of just one nostril when this happens, with very little air flow...
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Facts About Nitrogen - Live Science  Dec 22, 2014 ... Nitrogen gas constitutes 78 percent of Earth's air, according to the ... The colorless ammonia gas with a pungent smell can be easily liquefied into a nitrogen fertilizer. ... produced is used as fertilizer, and it is also used as a refrigerant gas ... The nitrogen cycle, in which atmospheric nitrogen is converted into...
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Rainforest Facts - Wealth of the Rainforest  Dec 21, 2012 ... Rainforests once covered 14% of the earth's land surface; now they ... More than 20 percent of the world oxygen is produced in the Amazon Rainforest. ... less than 1% of these tropical trees and plants have been tested by scientists. .... The life force of the Amazon rainforest is the mighty Amazon River.