Benchmark
5E
The Living Environment: Flow of Matter and Energy
Grades 6-8, page 120
Over a long time, matter is transferred from one organism to another
repeatedly and between organisms and their physical environment. As in
all material systems, the total amount of matter remains constant, even
though its form and location change.
NSES Content Standard C
Life Science: The interdependence of organisms
Grades 9-12, page 186
The atoms and molecules on the earth cycle among the living and nonliving
components of the biosphere.
NSES Content Standard C
Life Science: Matter, energy, and organization in living systems
Grades 9-12, page 186
As matter and energy flows through different levels of organization
of living systems--cells, organs, organisms, communities--and between living
systems and the physical environment, chemical elements are recombined
in different ways. Each recombination results in storage and dissipation
of energy into the environment as heat. Matter and energy are conserved
in each change.
NSES Content Standard D
Earth and Space Science: Geochemical cycles
Grades 9-12, page 189
The earth is a system containing essentially a fixed amount of each
stable chemical atom or element. Each element can exist in several different
chemical reservoirs. Each element on earth moves among reservoirs in the
solid earth, oceans, atmosphere, and organisms as part of geochemical cycles.
See also the general discussion in Unifying Concepts and Processes:
Constancy, change, and measurement.
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