NSES Content Standard D
Earth and Space Science: Geochemical cycles Grades 9-12, page 189 Movement of matter between reservoirs is driven by the earth's internal
and external sources of energy. These movements are often accompanied by
a change in the physical and chemical properties of the matter. Carbon,
for example, occurs in carbonate rocks such as limestone, in the atmosphere
as carbon dioxide gas, in water as dissolved carbon dioxide, and in all
organisms as complex molecules that control the chemistry of life.
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