Page 95 - Science Course 3 (Book 1)

Mo2-L7b: How is Energy Flow Modeled?

Each stage of a food chain has less available food Key Concept
energy than the last one, because some food energy
is converted to thermal energy and moves to the How is Energy Flow Modeled?
environment.
Compare a food chain with a food web.
A food web is a model that shows several
connected food chains.

Modeling Energy Flow

Food chains and food webs are models used to help
understand how energy travels through a community.

Terrestrial and aquatic
organisms can interact
within a food chain or
food web. SUMMARY
How is Energy Flow Modeled?

Consumers must use the energy and
nutrients stored in other organisms for living
and reproducing.

Food webs show that food energy can
move through several different
pathways.

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