NSES Content Standard C
Life Science: Matter, energy, and organization in living systems Grades 9-12, page 186 The energy for life primarily derives from the sun. Plants capture energy
by absorbing light and using it to form strong (covalent) chemical bonds
between the atoms of carbon-containing (organic) molecules. These molecules
can be used to assemble larger molecules with biological activity (including
proteins, DNA, sugars and fats). In addition, the energy stored in bonds
between the atoms (chemical energy) can be used as sources of energy for
life processes.
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Benchmark 5E The Living Environment:
Flow of Matter and Energy
Grades 9-12, page 121
The chemical elements that make up the molecules of living things pass
through food webs and are combined and recombined in different ways. At
each link in a food web, some energy is stored in newly made structures
but much is dissipated into the environment as heat. Continual input of
energy from sunlight keeps the process going.