Final Answer:
Much of this energy is used for metabolic processes and is lost as heat.
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Explanation:
In ecosystems, energy moves from one trophic level to the next—like from plants (producers) to herbivores (primary consumers), then to carnivores (secondary consumers), and so on. But only about 10% of the energy from one level gets passed to the next. The rest—about 90%—is *not* transferred. Why? Because organisms use most of the energy they eat just to stay alive: breathing, moving, growing, repairing cells, etc. These are called *metabolic processes*, and they release energy as *heat*, which can’t be reused by other organisms. So, the 90% isn’t “gone”—it’s used up and lost as heat. That’s why food chains rarely have more than 4 or 5 levels: there’s not enough energy left after a few steps.
Parent Tip: Review the logic above to help your child master the concept of energy in ecosystems worksheet.
