AnswersNC-Earth Environmental Science LBThe Cycles of Matter

Energy Flow in Ecosystems Answers

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A meadow food chain is shown.

Question illustration
A
primary consumer
B
secondary consumer
C
producer
D
decomposer
2
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Study the diagram of a desert food chain.

Question illustration
A
The number of snakes would increase.
B
The number of cactus plants would increase.
C
The number of foxes would be unaffected.
D
The number of cactus plants would be unaffected.
3

carnivoreherbivoreconsumerdecomposer

A
carnivore
B
herbivore
C
consumer
D
decomposer
4

The diagram shows an energy pyramid.

Question illustration
A
10 kcal
B
100 kcal
C
1,000 kcal
D
10,000 kcal
5

Which statements describe the energy in a food web? Select three options.

A
When an organism eats another organism, it loses energy.
B
Producers have the greatest amount of available energy.
C
Energy can follow many different paths.
D
When an organism eats another organism, it gains energy.
E
Producers have the least amount of available energy.
F
Energy always follows a single path.
7

In a rainforest food chain, caterpillars and butterflies eat orchid plants. Toucans eat the caterpillars and butterflies. Leopards eat the toucans.Which statement describes the energy in this food chain?

A
The leopards gain energy directly from the butterflies.
B
The orchids have the least amount of available energy.
C
The caterpillars gain energy directly from the orchids.
D
The toucans have more available energy than the butterflies.
8

An ocean food web is shown.

Question illustration
A
sea urchin
B
sea otter
C
kelp
D
elephant seal
9

Which statement explains the most realistic way to model energy flow in an ecosystem?

A
A food chain is most realistic because many organisms eat one type of food, and energy moves through a single pathway.
B
A food chain is most realistic because many organisms eat a variety of foods, and energy moves through different pathways.
C
A food web is most realistic because many organisms eat one type of food, and energy moves through a single pathway.
D
A food web is most realistic because many organisms eat a variety of foods, and energy moves through different pathways.
10

Skunks eat fruits, worms, plants, fish, insects, and more.Which describes the role of a skunk?

A
autotrophic omnivore
B
heterotrophic omnivore
C
autotrophic carnivore
D
heterotrophic carnivore
11

Which organism is a carnivore?

A
giraffe
B
elephant
C
lion
D
bear
12

Rosa has a vegetable garden. She places earthworms, which are decomposers, in the garden soil.What is Rosa most likely trying to do?

A
prevent insects from eating the plants
B
create usable food energy for the plants
C
enrich the soil with nutrients
D
kill the bacteria in the soil
13

What are the roles of consumers? Select two options. to create usable food energyto balance the number of producers in an ecosystemto break down dead organismsto eat other organismsto provide energy for producers

A
to create usable food energy
B
to balance the number of producers in an ecosystem
C
to break down dead organisms
D
to eat other organisms
E
to provide energy for producers
14

Sayid drew an energy pyramid.

Question illustration
A
a trophic level
B
a food chain
C
a type of producer
D
a different ecosystem
15

When moving upward on an energy pyramid from one level to the next, what happens to the usable energy in an ecosystem?

A
It increases by about 10%.
B
It increases by about 90%.
C
It decreases by about 10%.
D
It decreases by about 90%.

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