Geography, 17.07.2019 20:30, sparky1234

Which statement best describes the purpose of earth's spheres?
a. they work together as open systems to cycle matter through ecosystems.
b. they work independently as closed systems to cycle matter through ecosystems.
c. they work together as open systems to move matter to living and nonliving parts of
earth.
d. they work independently as closed systems to move nutrients to living and nonliving
parts of earth.

Answers: 1

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Which statement best describes the purpose of earth's spheres?
a. they work together as open...