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The Carbon Cycle
Why Is the Carbon Cycle Important?
The Exchange of Carbon on Earth
by Anne Marie Helmenstine, Ph.D.
The carbon cycle describes the way the
element carbon moves between the Earth's
biosphere, hydrosphere, atmosphere, and geosphere.
It is important for a few reasons:
1. Carbon
is an essential element for all life, so understanding how it moves helps us to
understand biological processes and factors that influence them.
2. One
form carbon takes is the greenhouse gas carbon dioxide, CO2.
Increased levels of carbon dioxide insulate the Earth, causing temperatures to rise. Understanding
how carbon dioxide is absorbed and released helps us understand the climate and
predict global warming.
3. Carbon
is not in balance, so it's important to learn where it is being stored and
released. The rate at which carbon is deposited into living organisms is not
the same as the rate it is returned to the Earth. There is about 100x more
carbon in living matter than in the Earth. Burning fossil fuels releases
massive amounts of carbon into the atmosphere and to the Earth.
4. The
carbon cycle is tied to the availability of other elements and compounds. For
example, the carbon cycle is tied to the availability of oxygen in the
atmosphere. During photosynthesis, plants take carbon dioxide from the air
and used it to make glucose (stored carbon), while releasing oxygen.
Anne
Marie Helmenstine, Ph.D.
Introduction
Ph.D.
in biomedical sciences from the University of Tennessee at Knoxville - Oak
Ridge National Laboratory.
Science
educator with experience teaching chemistry, biology, astronomy, and
physics at the high school, college, and graduate levels.
ThoughtCo
and About Education chemistry expert since 2001.
Widely-published
graphic artist, responsible for printable periodic tables and other
illustrations used in science.
Experience
Anne
Helmenstine, Ph.D. has covered chemistry for ThoughtCo and About Education
since 2001, and other sciences since 2013. She taught chemistry, biology,
astronomy, and physics at the high school, college, and graduate levels.
She has worked as a research scientist and also abstracting and indexing
diverse scientific literature for the Department of Energy.
In
addition to her work as a science writer, Dr. Helmenstine currently serves as a
scientific consultant, specializing in problems requiring an interdisciplinary
approach. Previously, she worked as a research scientist and college professor.
Education
Dr.
Helmenstine holds a Ph.D. in biomedical sciences from the University of
Tennessee at Knoxville and a B.A. in physics and mathematics with a minor
in chemistry from Hastings College. In her doctoral work, Dr. Helmenstine
developed ultra-sensitive chemical detection and medical diagnostic tests.
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and Dotdash
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