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oxygen
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oxygen
How much air do you breathe in a lifetime?
Explore an interactive periodic table of the elements explosion limits abundance of oxygen oxygen cycle Figure 10: Schematic view of ozone chemistry in a pure oxygen environment. polar covalent bond cryogenic region Figure 1: Schematic diagram of a zirconia oxygen sensor used to monitor automobile exhaust gases. The sensor, approximately the size of a spark plug, is fitted into the exhaust manifold of an automobile engine. The thimble-shaped zirconia sensor, sandwiched between thin layers of porous platinum, is exposed on its interior to outside air and on its exterior to exhaust gas passing through slits in the sensor shield. The two platinum surfaces serve as electrodes, conducting a voltage across the zirconia that varies according to the difference in oxygen content between the exhaust gas and the outside air.
For Students
oxygen summary
Quizzes
Concept artwork on the periodic table of elements.
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Periodic Table of the elements concept image (chemistry)
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Encyclopaedia Britannica thistle graphic to be used with a Mendel/Consumer quiz in place of a photograph.
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Illustration of molecules. (molecular, chemistry, science)
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Leaves are silhouetted against an orange and yellow sky with twilight. (plants, petioles, nature)
Do Plants Emit Oxygen and Carbon Dioxide at Night?
Sunlight shining on leaves. Photosynthesis
What Does Photosynthesis Produce?
Lightning over the outskirts of Oradea, Rom., during the thunderstorm of August 17, 2005.
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Global warming illustration
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Baseball laying in the grass. Homepage blog 2010, arts and entertainment, history and society, sports and games athletics
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The Cheshire Cat is a fictional cat from Lewis Carroll's Alice's Adventures in Wonderland. (Alice in Wonderland)
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Videos

How much air do you breathe in a lifetime?
Every minute, multiple liters of air are cycled through your lungs.
Video: Encyclopædia Britannica, Inc.
Understand the carbon and oxygen cycles in the atmosphere
Living organisms influence the cycling of carbon and oxygen through the environment.
Video: Created and produced by QA International. © QA International, 2010. All rights reserved. www.qa-international.com
How a candle flame burns
Exploring why candle flames burn.
Video: © American Chemical Society (A Britannica Publishing Partner)
How light affects plant growth
Experimental evidence of plant respiration.
Video: Encyclopædia Britannica, Inc.
The relationship between photosynthesis and breathing
Learn about the role of photosynthesis in glucose and oxygen production in plants....
Video: Encyclopædia Britannica, Inc.
Learn about the oxygen-transporting function and molecular structure of the protein hemoglobin
Hemoglobin is an example of a globular protein. Learn how hemoglobin proteins in...
Video: Encyclopædia Britannica, Inc.

Images

oxygen
Encyclopædia Britannica, Inc.
explosion limits
Figure 1: Explosion limits of a hydrogen-oxygen mixture.
Encyclopædia Britannica, Inc.
abundance of oxygen
A “best guess” reconstruction of the abundance of O2 in Earth's atmosphere...
Encyclopædia Britannica, Inc.
oxygen cycle
The generalized oxygen cycle.
Encyclopædia Britannica, Inc.
Figure 10: Schematic view of ozone chemistry in a pure oxygen environment.
Encyclopædia Britannica, Inc.
polar covalent bond
In polar covalent bonds, such as that between hydrogen and oxygen atoms, the electrons...
Encyclopædia Britannica, Inc.
cryogenic region
The cryogenic temperature range.
Encyclopædia Britannica, Inc.
Figure 1: Schematic diagram of a zirconia oxygen sensor used to monitor automobile...
Encyclopædia Britannica, Inc.

Interactives

Explore an interactive periodic table of the elements
Periodic table of the elements.
Encyclopædia Britannica, Inc.
VIEW MORE in these related Britannica articles: