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Transcript of Oxygen Cycle
Breaking down of rocks, soil, and minerals
contact with the Earth's atmosphere, biota, and water
Oxygen aids in breaking down organic sediment
Oxygen Cycle Basics
We need oxygen for more than just breathing...
Decomposition of organic waste
Heterotrophs preform cellular repiration
Our health along with our planet's depends on oxygen
Burning fossil fuels increase carbon dioxide levels
Atmosphere tries to achieve balance so oxygen levels go down to compensate
Natural combustion includes volcanic eruptions and forest fires
Most pollution problems occur from cars and factories that release CO2 by burning fossil fuels
Plants pull off CO2 and use the carbon in glucose
Plants release the oxygen back into the atmosphere
Other organisms use the free oxygen for respiration
The envelope of gases surrounding the earth
Photolysis donates a large portion of the oxygen to the atmosphere
In water oxygen is
1. broken down by microorganisms
2. released again in constant cycle
Without oxygen in a body of water, anaerobic bacteria would produce acids that harm aquatic life
Human Influence and Effects
Humans inhale oxygen and exhale carbon dioxide
Burning of fossil fuels Carbon dioxide levels rise
Rise in carbon dioxide decline in oxygen
chemical process where green plants use sunlight to synthesize foods from carbon dioxide and water
cells break up glucose into a form that can be used as energy.
chemical decomposition of molecules under the influence of light
most common way in which oxygen combines with other substances
O3 makes up ozone in stratosphere
1/5 of atmospheric gases
Byproduct of photosynthesis
Respiration of all heterotrophs
Dissolved oxyen consumed through metabolization
Bound to rocks and unavailable for use
By Amanda Comeau, Elly Cowan, Nate Marx, and Truman Miller
3 main reservoirs
The Oxygen Cycle
Zimmer, Carl (3 October 2013). "Earth’s Oxygen: A Mystery Easy to Take for Granted". New York Times. Retrieved 3 October 2013.
Water is the most important cause of chemical weathering
Oxygen breaks down minerals on an atomic level
Oxidizers react with minerals in the rock to break it down