Photosynthesis captures energy in sunlight and stores it in chemical bonds of matter. Most organisms rely on The matter that make up the organisms cellular respiration to release energy in in an ecosystem are cycled repeatedly these bonds to power life processes. LS2.B between the living and nonliving parts [Content found in About 90% of available energy is lost Cycles of Matter cycles between the air, of the ecosystem. Food webs model LS1.C, LS2.A, from one trophic level to the next, water, and soil and among the transfer of energy as well as matter matter and and ESS3.A] resulting in fewer organisms at higher organisms as they live and die. among producers, consumers, and energy transfer levels. At each link in an ecosystem, decomposers within an ecosystem. in ecosystems elements are combined in different The Sun provides the energy for most ways and matter and energy are ecosystems on Earth. conserved. Photosynthesis, cellular respiration and decomposition are key components of the global carbon cycle.
LS2.B Cycles of matter and energy transfer in ecosystems [Content found in LS1.C, LS2.A, and ESS3.A] Matter cycles between the air, water, and soil and among organisms as they live and die. The matter that make up the organisms in an ecosystem are cycled repeatedly between the living and nonliving parts of the ecosystem. Food webs model the transfer of energy as well as matter among producers, consumers, and decomposers within an ecosystem. The Sun provides the energy for most ecosystems on Earth. Photosynthesis captures energy in sunlight and stores it in chemical bonds of matter. Most organisms rely on cellular respiration to release energy in these bonds to power life processes. About 90% of available energy is lost from one trophic level to the next, resulting in fewer organisms at higher levels. At each link in an ecosystem, elements are combined in different ways and matter and energy are conserved. Photosynthesis, cellular respiration and decomposition are key components of the global carbon cycle.