Energy in Ecosystems

Name
Date
Class
Chapter 20
LESSON 3
Content Practice A
Energy in Ecosystems
Directions: On each line, write the term from the word bank that correctly completes each sentence. Each term is
used only once.
chemosynthesis
conservation
consumers
cycle
decomposition
detritivores
energy pyramid
flow pattern
food web
photosynthesis
producers
Sun
trophic level
1. Energy in an ecosystem does not move in a(n)
does; it moves in a(n)
, as matter
.
2. The principle that energy cannot be created or destroyed is called the law of
of energy.
3. Certain
the
called
contribute to
of dead organisms.
because they use energy from the
to make food. The process they use to do this is
called
.
5. A similar process, which occurs at hydrothermal vents on the seafloor, is
called
.
6. A food chain is usually part of a larger
7. Scientists use a model called a(n)
.
to show the
in a food chain.
46
Matter and Energy in the Environment
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4. Plants are called