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Decomposer & Food Chain

Total questions: 100

Worksheet time: 59mins

Name
Class
Date
1.

Organisms that break down waste are called ___

a)

herbivores

b)

carnivores

c)

decomposers

2.

Energy flows through a system of living things in a model called ___

a)

the carbon cycle

b)

a food chain

3.

In an ecosystem, decomposers break down ___

a)

waste

b)

wood

4.

Where do decomposers fit into the food chain?

a)

at the beginning

b)

in the end

c)

anywhere

5.

An apple tree is a

a)

decomposer

b)

producer

c)

consumer

6.

A hawk is an example of a

a)

producer

b)

decomposer

c)

consumer

7.

A mushroom is a

a)

producer

b)

consumer

c)

decomposer

8.

Where does the energy start in this food chain?

a)

plant

b)

sun

c)

deer

d)

wolf

9.

What do decomposers eat?

a)

only plants

b)

only animals

c)

plants and animals

d)

dead organisms

10.

Which of the following is NOT an example of a decomposer?

a)

fungi

b)

hawk

c)

bacteria

d)

some flies and beetles

11.

What do all food chains start with?

a)

producers

b)

consumers

c)

omnivores

d)

herbivores

12.

How do decomposers help other living things in ecosystems?

a)

They release oxygen into the atmosphere

b)

They turn sunlight into energy

c)

They release matter and nutrients back into the soil

d)

They get rid of dead animals so they don't smell bad

13.

In this food web, the seagull is an example of a...

a)

decomposer

b)

carnivore

c)

herbivore

d)

omnivore

14.

In this food web, the seaweed is an example of a...

a)

producer

b)

consumer

c)

carnivore

d)

decomposer

15.

All energy on Earth ultimately comes from what source?

a)

water

b)

sun

c)

consumers

d)

oxygen

16.

What are plants called in a food chain?

a)

producers

b)

consumers

c)

decomposers

d)

scavengers

17.

What are animals called in a food chain?

a)

producers

b)

consumers

c)

decomposers

d)

plants

18.

What are the organisms that break down dead animals and plants?

a)

producers

b)

consumers

c)

decomposers

d)

organisms

19.

Click on the image to make it larger-- Choose all that apply: The hawk gets energy from...

a)

mouse

b)

rabbit

c)

wildflower

d)

snake

20.

Click on the image to make it larger-- Choose the living things that are producers...

a)

wildflowers

b)

rabbit

c)

snake

d)

grass

21.

A ____________________ shows how energy is passed from one living thing to another...

a)

ecosystem

b)

food chain

c)

habitat

22.

Bears eat berries and salmon. Bears are ...

a)

producers

b)

carnivores

c)

omnivores

23.

Why might an organism have more than one arrow coming towards them in a food web?

a)

More than one organism may eat them.

b)

They may eat more than one other organism.

c)

This organism gets its energy from multiple sources.

24.

What's the role of consumers in a food chain?

a)

Use sunlight to make food

b)

Eat other species and keep them from overpopulating

c)

Break down dead stuff

d)

Add nutrients to the soil

25.

Which food chain is in the correct order?

a)

cat, grass, bird, snail

b)

bird, snail, grass, cat

c)

grass, snail, bird, cat

d)

grass, cat, bird, snail

26.

Molds, bacteria, and worms are ________.

a)

food chains

b)

decomposers

c)

producers

d)

consumers

27.

Humans are considered...

a)

producers

b)

consumers

c)

decomposers

d)

all of the above

28.

What does a food web represent?

a)

All connections of energy flow throughout all organisms in a ecosystem.

b)

The specific ways that mutualism is carried out.

c)

A single pathway or energy flow between organisms.

d)

How carnivores get their food.

29.

In the photo below, the dandelion gets energy from the _____________.

a)

dead producer

b)

rabbit

c)

sun

d)

heat

30.

AS the dandelion grows and moves, the energy ___________ and is lost as heat.

a)

increases

b)

decreases

c)

stays the same

31.

A decomposer uses the energy from a dead consumer to...(click all that apply)

a)

break down the dead organism

b)

become alive

c)

provide nutrients to the soil

32.

A ________ is a model that show the amount of energy that is passed on at each level of a food chain.

a)

food chain

b)

ecosystem

c)

energy pyramid

d)

food web

33.

Organisms that break down waste are called ___

a)

herbivores

b)

carnivores

c)

decomposers

34.

Energy flows through a system of living things in a model called ___

a)

the carbon cycle

b)

a food chain

35.

In an ecosystem, decomposers break down ___

a)

waste

b)

wood

36.

Where do decomposers fit into the food chain?

a)

at the beginning

b)

in the end

c)

anywhere

37.

An apple tree is a

a)

decomposer

b)

producer

c)

consumer

38.

A hawk is an example of a

a)

producer

b)

decomposer

c)

consumer

39.

A mushroom is a

a)

producer

b)

consumer

c)

decomposer

40.

Where does the energy start in this food chain?

a)

plant

b)

sun

c)

deer

d)

wolf

41.

What do decomposers eat?

a)

only plants

b)

only animals

c)

plants and animals

d)

dead organisms

42.

Which of the following is NOT an example of a decomposer?

a)

fungi

b)

hawk

c)

bacteria

d)

some flies and beetles

43.

What do all food chains start with?

a)

producers

b)

consumers

c)

omnivores

d)

herbivores

44.

How do decomposers help other living things in ecosystems?

a)

They release oxygen into the atmosphere

b)

They turn sunlight into energy

c)

They release matter and nutrients back into the soil

d)

They get rid of dead animals so they don't smell bad

45.

In this food web, the seagull is an example of a...

a)

decomposer

b)

carnivore

c)

herbivore

d)

omnivore

46.

In this food web, the seaweed is an example of a...

a)

producer

b)

consumer

c)

carnivore

d)

decomposer

47.

All energy on Earth ultimately comes from what source?

a)

water

b)

sun

c)

consumers

d)

oxygen

48.

What are plants called in a food chain?

a)

producers

b)

consumers

c)

decomposers

d)

scavengers

49.

What are animals called in a food chain?

a)

producers

b)

consumers

c)

decomposers

d)

plants

50.

What are the organisms that break down dead animals and plants?

a)

producers

b)

consumers

c)

decomposers

d)

organisms

51.

Click on the image to make it larger-- Choose all that apply: The hawk gets energy from...

a)

mouse

b)

rabbit

c)

wildflower

d)

snake

52.

Click on the image to make it larger-- Choose the living things that are producers...

a)

wildflowers

b)

rabbit

c)

snake

d)

grass

53.

A ____________________ shows how energy is passed from one living thing to another...

a)

ecosystem

b)

food chain

c)

habitat

54.

Bears eat berries and salmon. Bears are ...

a)

producers

b)

carnivores

c)

omnivores

55.

Why might an organism have more than one arrow coming towards them in a food web?

a)

More than one organism may eat them.

b)

They may eat more than one other organism.

c)

This organism gets its energy from multiple sources.

56.

What's the role of consumers in a food chain?

a)

Use sunlight to make food

b)

Eat other species and keep them from overpopulating

c)

Break down dead stuff

d)

Add nutrients to the soil

57.

Which food chain is in the correct order?

a)

cat, grass, bird, snail

b)

bird, snail, grass, cat

c)

grass, snail, bird, cat

d)

grass, cat, bird, snail

58.

Molds, bacteria, and worms are ________.

a)

food chains

b)

decomposers

c)

producers

d)

consumers

59.

Humans are considered...

a)

producers

b)

consumers

c)

decomposers

d)

all of the above

60.

What does a food web represent?

a)

All connections of energy flow throughout all organisms in a ecosystem.

b)

The specific ways that mutualism is carried out.

c)

A single pathway or energy flow between organisms.

d)

How carnivores get their food.

61.

In the photo below, the dandelion gets energy from the _____________.

a)

dead producer

b)

rabbit

c)

sun

d)

heat

62.

AS the dandelion grows and moves, the energy ___________ and is lost as heat.

a)

increases

b)

decreases

c)

stays the same

63.

A decomposer uses the energy from a dead consumer to...(click all that apply)

a)

break down the dead organism

b)

become alive

c)

provide nutrients to the soil

64.

A ________ is a model that show the amount of energy that is passed on at each level of a food chain.

a)

food chain

b)

ecosystem

c)

energy pyramid

d)

food web

65.
Where does the energy start in this food chain?
a)
Plant
b)
Sun
c)
Deer
d)
Wolf
66.

Which of these is an organism that does not depend on another living thing for food?

a)

the Sun

b)

an insect

c)

a plant

d)

an animal

67.

Which of these completes the food chain correctly?

a)

a rock

b)

a fox

c)

a plant

d)

an egg

68.

Which organism is getting energy from the mouse?

a)

cricket

b)

grass

c)

fox

d)

Sun

69.

Which of these best completes the food chain shown?

a)

a shark

b)

a tree

c)

a rock

d)

a bird

70.

Which of these is a possible food chain for this environment?

a)

Sun → grass → fly → frog

b)

frog → fly → grass → Sun

c)

Sun ← grass ← fly ← frog

d)

Sun → fly → frog → snake

71.
Which of the following best describes the deer's role in the ecosystem?
a)
herbivore
b)
omnivore
c)
carnivore
d)
decomposer
72.
Which of the following best describes the wolf's role in this ecosystem?
a)
herbivore
b)
omnivore
c)
carnivore
d)
decomposer
73.
Which of the following best describes the blue bird's (in the middle) role in this ecosystem?
a)
carnivore
b)
omnivore
c)
herbivore
d)
decomposer
74.
_________ cannot make their own food, so they need to consume (eat) plants or animals.
a)
consumers
b)
producers
c)
decomposers
75.
The  ____________ provides all the initial energy to plants.
a)
sun
b)
moon
c)
environment
d)
water
76.

Which is an example of a producer?

a)
b)
c)
d)
77.

What is the role of a producer?

a)

Use sunlight to make food

b)

Gain energy from eating other organisms

c)

Keep other species from overpopulating

d)

Breaking down dead stuff

78.

Which of these organisms would receive energy from the snake?

a)

Plant

b)

Rabbit

c)

Mouse

d)

Hawk

79.

Which type of consumer eats plants only?

a)

Herbivores

b)

Omnivores

c)

Carnivores

d)

Scavengers

80.

Which type of consumer eats meat only?

a)

Producers

b)

Herbivores

c)

Carnivores

d)

Omnivores

81.

Which type of consumer eats meat and plants?

a)

Herbivores

b)

Carnivores

c)

Omnivores

d)

Plants

82.

What is a producer?

a)

an organism that gets energy from eating other organisms

b)

an organisms that uses sunlight to make its own food

c)

an organism that gets energy from eating dead organisms, non-living material or waste

d)

an organism that uses chemical energy to make its own food

83.

The roadrunner is a desert bird that eats fruits and seeds. It also eats insects, spiders, scorpions, and rattlesnakes.


What would likely happen if the roadrunner population disappeared from its ecosystem?

a)

There would be no more fruits or seeds.

b)

There would a decrease in spider populations.

c)

The rattlesnake population would stay the same.

d)

There would be an increase in scorpion populations.

84.

The diagram shows a food chain.


The squirrel gets its energy directly from -

a)

sun

b)

trees

c)

other squirrels

d)

hawk

85.

What is a part of the food chain that makes its own food and nutrients?

a)

consumer

b)

producer

c)

omnivore

d)

sun

86.

According to this food chain, how does the snake get energy?

a)

by eating the hawk

b)

by eating the rabbit

c)

by eating the berries

d)

by being in the Sun

87.

Which of these gets energy from a nonliving thing?

a)

the Sun

b)

the grass

c)

the mouse

d)

the fox

88.

Which of these is true about the food chain shown?

a)

The caterpillar gets energy from the bird.

b)

The caterpillar becomes a bird.

c)

The milkweed plant gets energy from animals.

d)

The bird gets energy from the caterpillar.

89.

Due to the fact that plants can make their own food using photosynthesis, what are plants considered in food chains?

a)

omnivores

b)

consumbers

c)

producers

d)

carnivores

90.

What is the process called when a plant uses the sun to make its own food (glucose)?

a)

photosynthesis

b)

respiration

c)

transpiration

91.

Which choice below shows the correct order of a food chain?

a)

sun -> rabbit -> tomato plant -. decomposer -> hawk

b)

tomato plant -> decomposer -> sun -> rabbit -> hawk

c)

sun -> tomato plant -> rabbit -> hawk -> decomposer

92.
What's the role of consumers in a food chain?
a)
Use sunlight to make food 
b)
Eat other species and keep them from overpopulating
c)
Break down dead stuff
d)
Add nutrients to the soil
93.
What is the role of a producer?
a)
Use sunlight to make food
b)
Gain energy from eating other organisms
c)
Keep other species from overpopulating
d)
Breaking down dead stuff 
94.

Which words from the text help readers understand the word predators?

a)

ice and snow

b)

such as reindeer

c)

animals that hunt

d)

animals that eat

95.
An organism that is killed and eaten by another organism
a)
Predator
b)
Prey
c)
Competition
d)
Adaptation
96.
If a hawk eats a snake, the snake is the...
a)
Predator
b)
Alpha
c)
Prey
d)
Mutualistic partner
97.

Which the predator?

a)
b)
98.

Which the prey?

a)
b)
99.

Which the predator?

a)
b)
100.

Which the prey?

a)
b)

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