Free Printable Ecosystem Review

1.

An organism that makes its own food from the sun

a)

consumer

b)

herbivore

c)

producer

d)

decomposer

2.

An organism that eats other organisms in order to get energy.

a)

producer

b)

consumer

c)

decomposer

3.

An organism that only eats plants

a)

herbivore

b)

carnivore

c)

scavenger

d)

decomposer

4.

What type of organism eats only producers and consumers?

a)

herbivore

b)

carnivore

c)

omnivore

d)

decomposer

5.

Which has the greatest effect on the amount of salt in a salt marsh?

a)

the number of animals living in the marsh

b)

the closeness of the marsh to the ocean

c)

the depth of the water in the marsh

d)

the temperature of the water in the marsh

6.

Which classification best describes herbivores?

a)

producers

b)

consumers

c)

predators

d)

decomposers

7.

What will be most affected in the decomposers in an ecosystem are removed?

a)

the spread of disease

b)

the availability of water

c)

the quality of soil

d)

the distribution of organisms

8.

This is a food chain that includes grass, a grasshopper, and a bird.

grass- grasshopper- bird

How is the grass in this food chain best described?

a)

It is a producer, because it makes its own food

b)

It is a producer, because it is eaten by a consumer

c)

It is a consumer, because it gets energy from producers

d)

It is a decomposer, because it breaks down sunlight.

9.

Which would most likely cause a decrease in a population of herbivores?

a)

an increase in the number of producers

b)

a decrease in the types of decomposers

c)

an increase in the types of plants

d)

an increase in the number of carnivores

10.

A mouse eats seeds and insects. Which best describes the role of the mouse?

a)

consumer

b)

decomposer

c)

herbivore

d)

producer

11.

What would most likely result if all plants in an area were destroyed?

a)

consumer populations would increase because more sunlight would reach the ground

b)

Decomposer populations would increase because more sunlight would reach the ground

c)

Consumer population would decrease because plants provide them with water.

d)

Consumer population would decrease because plants provide them energy.

12.

What would most likely happen if all of the decomposers in an ecosystem were removed?

a)

The animals in the ecosystem would die because of the spread of disease.

b)

The plants in the ecosystem would eventually die because of a lack of nutrients in the soil.

c)

The plants in the ecosystem would begin to die out because of a decrease in available water.

d)

The animals in the ecosystem would eat other types of food because of a decrease in producers

13.

A food chain in an ecosystem includes blackberry bushes, deer, and wolves.

* Deer eat blackberries

* Wolves eat deer

If the population of wolves decreases, how will this affect the population of blackberry bushes?

a)

It will decrease because there will be fewer deer

b)

It will increase because there will be fewer deer

c)

It will decrease because there will be more deer

d)

It will increase because there will be more deer

14.

What are living factors (trees, insects, animals, and people) in an ecosystem called?

a)

abiotic factors

b)

biotic factors

15.

Which of these are examples of decomposers?

a)

bacteria

b)

fungi

c)

mushroom

d)

earth worm

e)

all of them

Ecosystem Review

Total questions: 15

Worksheet time: 8mins

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