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WorksheetsEcosystems NC5.L.2.2 (Part B)
Total questions: 15
Worksheet time: 43mins
Name
Class
Date
1.
Which describes a decomposer?
a)
an organism that eats only plants
b)
an organism that makes its own food
c)
an organism that breaks down dead matter
d)
an organism that receives energy from the sun
2.
In a food chain, the sun provides energy for an apple tree to grow. A deer eats an apple from the tree. Which is a consumer?
a)
the tree
b)
the apple
c)
the sun
d)
the deer
3.
An ecosystem is a community of organisms interacting with their physical environment. Why are decomposers an important part of ecosystems?
a)
They break down dead organisms to return nutrients to the soil.
b)
They produce their own food for survival.
c)
They play a role in preventing weathering and erosion.
d)
They provide most of the energy to consumers.
4.
Which best describes a producer?
a)
an organism that gets its energy from plants
b)
a plant that makes its own food
c)
the sun because it provides energy for plants
d)
an organism that gets its energy from animals
5.
Tyler is classifying organisms according to their source of energy. Based on the food chain pictured, which organism would be considered a carnivore?
a)
ant
b)
bird
c)
maple leaf
6.
What best describes the roles of the organisms pictured in order from left to right?
a)
consumer, producer, consumer
b)
producer, decomposer, consumer
c)
consumer, decomposer, consumer
7.
Which is the first organism in a food chain?
a)
decomposer
b)
producer
c)
consumer
8.
In which category are all living things most directly dependent upon the sun for energy?
a)
carnivores
b)
producers
c)
herbivores
d)
decomposers
9.
How are consumers and decomposers related?
a)
Decomposers provide soil for consumers.
b)
Consumers change the sun’s energy so it is useful for decomposers.
c)
Decomposers provide food for carnivorous consumers.
d)
Consumers provide nutrients for decomposers.
10.
Which best describes how decomposers help support life in an ecosystem?
a)
Decomposers add nutrients to the soil.
b)
Decomposers provide a habitat in the ecosystem.
c)
Decomposers add producers to the ecosystem.
d)
Decomposers provide energy for consumers.
11.
Which best describes the role of a first-level consumer in an ecosystem?
a)
Consumers eat scavengers and pass the energy along in an ecosystem.
b)
Consumers eat producers and pass the energy along in an ecosystem.
c)
Consumers eat decomposers and pass the energy along in an ecosystem.
d)
Consumers eat other consumers and pass the energy along in an ecosystem.
12.
Which best describes the role of decomposers in an ecosystem?
a)
Decomposers eat consumers and pass along energy.
b)
Decomposers eat scavengers and pass along energy.
c)
Decomposers get energy from the sun to help producers.
d)
Decomposers get energy by breaking down decaying matter.
13.
Which will most likely cause a decrease in predator populations?
a)
an increase in prey populations
b)
a decrease in prey populations
c)
a decrease in decomposers
d)
an increase in producers
14.
Which is an example of a decomposer?
a)
a hawk
b)
a mouse
c)
a flower
d)
a mushroom
15.
Which best explains why producers are an important part of an ecosystem?
a)
They pass the Sun’s energy on to other organisms.
b)
They pass energy from consumers to decomposers.
c)
They make their own energy and pass it on to other producers.
d)
They pass energy from first-level consumers to second-level consumers.
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