Energy Flow in Ecosystems Answers

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Nida draws a diagram with insects, birds, and mice. She shows the mice eating grass; hawks, snakes, and toads eating the insects; and foxes, hawks, and snakes eating the birds and mice. The snakes are also eating the toads. Which best describes the diagram?

A
pyramid
B
food chain
C
food web
D
trophic level
3
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In an ecosystem, a deer consumes grass. What percentage of energy will the deer acquire from the grass?

A
0.1%
B
1%
C
10%
D
100%
4

Which of these is a producer?

A
moth
B
mushroom
C
fern
D
cheetah
5

The organisms in a food chain are listed in order of trophic level from left to right.Based on the food chain, if a hawk acquires 50 calories of energy, how much energy did the grasshopper get from the plant?

Question illustration
A
500 calories
B
5,000 calories
C
50,000 calories
D
500,000 calories
6

The diagram shows a food web.

Question illustration
A
grass
B
grasshopper
C
mouse
D
fox
7

Which statement best contrasts food chains and food webs?

A
Food webs show a single path of energy in an ecosystem, and food chains show all the overlapping food chains in that ecosystem.
B
Food chains show a single path of energy in an ecosystem, and food webs show all the overlapping food chains in that ecosystem.
C
Food webs show the path of energy in an ecosystem, and food chains show the path of nutrients in that ecosystem.
D
Food chains show the path of energy in an ecosystem, and food webs show the path of nutrients in that ecosystem.
8

The diagram shows a basic food chain.Which is the primary consumer?

Question illustration
A
rabbit
B
grass
C
snake
D
hawk
9

Which process is used by most producers to turn sunlight into food energy?

A
photosynthesis
B
cellular respiration
C
transpiration
D
evaporation
10

Which organisms obtain energy from dead or decaying matter? Select two options.

A
groundhogs
B
daisies
C
earthworms
D
bacteria
E
humans
F
phytoplankton

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