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Food Chains, Webs, and Trophic Levels

Total questions: 40

Worksheet time: 1hrs 29mins

Name
Class
Date
1.
An example of a decomposer is a _______.
a)
butterfly
b)
bear
c)
plant
d)
worm
2.
Plants are considered _________ because they make their own food.
a)
consumers
b)
producers
c)
makers
d)
decomposers
3.
These organisms break down dead things.
a)
Consumers
b)
Producers
c)
Decomposers
d)
Rotters
4.
This is the chemical process by which plants make their own food.
a)
Cellular respiration
b)
Combustion
c)
Electrolysis
d)
Photosynthesis
5.
The overlapping of food chains results in a ________.
a)
woven chain
b)
braided chain
c)
food web
d)
food nest
6.
This is the ultimate source of energy on Earth.
a)
Heat
b)
Fire
c)
Electricity
d)
The sun
7.
A grasshopper that eats the seeds of a plant is considered to be a _____________.
a)
producer
b)
decomposer
c)
consumer
d)
predator
8.

Where do animals get their energy?

a)

by eating plants

b)

by eating other animals

c)

from the sun

d)

from nutrients in the ground

9.
Where do crickets get their energy?
a)
Cattails
b)
Marsh Grass
c)
Grasshoppers
d)
Shrews
10.

What is the fruit fly's highest trophic level?

a)

Primary

b)

Secondary

c)

Tertiary

d)

Quaternary

11.
What organisms are at the bottom of an energy pyramid?
a)
Producer
b)
Consumer
c)
Decomposer
d)
Scavenger
12.

In the food chain below, which is the producer?


grass --> mouse --> snake --> hawk

a)

grass

b)

mouse

c)

snake

d)

hawk

13.
One food chain in an ecosystem might be grass, a mouse, a snake and a hawk. Which one is the producer?
a)
Grass
b)
Mouse
c)
Snake
d)
Hawk
14.

The diagram shows a food web for an ocean ecosystem.

How would an increasing shark population most likely affect this ecosystem?

a)

The algae population would decrease.

b)

The limpet population would decrease.

c)

The seagull population would decrease.

d)

The octopus population would decrease.

15.

This term describes the order in which matter and energy move through an ecosystem:

a)

food chain

b)

photosynthesis

c)

producer

d)

tertiary

16.

Examine the energy pyramid. Which organism best represents a secondary consumer?

a)

grass

b)

rabbit

c)

snake

d)

eagle

17.

Food chains in an ecosystem overlap to form:

a)

bacteria and decomposers

b)

food webs

c)

nutrient cycling

d)

photosynthesis

18.

What is your role in an ecosystem?

a)

producer

b)

consumer

c)

decomposer

d)

answer not listed

19.

A forest ecosystem food web is shown below. If additional wrens (small birds) are introduced into this ecosystem, there will most likely be an immediate decrease in the

a)

frog population

b)

snake population

c)

falcon population

d)

grasshopper population

20.

The picture below shows an energy pyramid. What will most likely happen to the foxes and the wolves if the rabbits are removed?

a)

The foxes will eat more wolves.

b)

The foxes will eat fewer wolves.

c)

There will be more foxes and wolves.

d)

There will be fewer foxes and wolves.

21.

The picture below shows an ocean bay food chain.Sea otters move into the ocean bay. They eat all the sea urchins. This change will cause the

a)

kelp to have less food.

b)

crabs to have more food

c)

sea ducks to have less food

d)

arctic faxes to have more food

22.

A marine food web is shown below. Which chart correctly shows three of the organisms according to their roles in cycling matter in the marine food web?

a)
b)
c)
d)
23.

The picture below shows the energy flow through a meadow community. Which of the following would most likely occur to the populations within the community of organisms immediately after a wildfire burns the environment?

a)

Hawks would increase and foxes would increase

b)

Hawks would decrease and foxes would increase

c)

Meadow plants would increase and rabbits would decrease

d)

Meadow plants would decrease and rabbits would decrease

24.

The diagram below shows a simple food web. Which animal is classified as an omnivore?

a)

red fox

b)

deer

c)

black bear

d)

rabbit

25.

The diagram below shows a marine food chain. The zooplankton in this food chain are

a)

primary producer

b)

primary consumer

c)

secondary consumer

d)

tertiary (third) consumer

26.

A food web diagram is provided. Based on the diagram, which three consumers all get their energy directly from the same producer?

a)

Plant seeds, field mouse, and snake

b)

Prairie grass, deer, and mountain lion

c)

Squirrel, deer, and mountain lion

d)

Squirrel, robin, and field mouse

27.

The diagram shows part of an ocean food web. Which statements are true about this food web?

a)

The kingfisher receives its energy from the blue crab and the striped bass.

b)

The arrows show how one organism changes to another.

c)

The blue crab provides energy for the shrimp.

d)

The arrows show the flow of energy from one organism to another.

e)

Producers, like shrimp, are organisms that depend on other organisms for food.

28.

Look at the image. Name the producers.

(a)  

29.

Look at the image. Name the producers.

a)

Mushroom

b)

Plants and Mushroom

c)

Plants

d)

Mouse, Owl, Snake, Fox, and Hawk

30.

Look at the image. Name the Decomposer.

a)

Mushroom

b)

Plants and Mushroom

c)

Plants

d)

Mouse, Owl, Snake, Fox, and Hawk

31.

Look at the image. Name the Consumers.

a)

Mushroom

b)

Plants and Mushroom

c)

Plants

d)

Mouse, Owl, Snake, Fox, and Hawk

32.

In a food web the arrow always points to

a)

the consumer

b)

the prey

c)

producer

d)

autotroph

33.
An organism that gets energy from eating other organisms is a ______________
a)
producer
b)
consumer
c)
decomposer
d)
prey
34.
Elephants only eat leaves, fruit, nuts and grass. They are called __________.
a)
Omnivore
b)
Fortivore
c)
Herbivore
d)
Carnivore
35.
__________ is an organism that eats BOTH plants and animals for energy.
a)
Omnivore
b)
Darnivore
c)
Carnivore
d)
Herbiovre
36.
In the energy pyramid here, which organisms have the most energy available?
a)
Producers
b)
Carnivores
c)
Herbivores
d)
Top Predator
37.

In this food web, the berries would be a _________.

a)

Producer

b)

Primary Consumer

c)

Secondary Consumer

d)

Tertiary Consumer

38.

In this food web, the bird would be a _________ and a _________.

a)

Producer

b)

Primary Consumer

c)

Secondary Consumer

d)

Tertiary Consumer

39.

Which student's model best represents available energy at each level of the food web and how it is transferred?

a)

Shirley

b)

Abed

c)

Troy

d)

Britta

40.

In a predator-prey relationship, which of the following is the predator?

a)

Mouse

b)

Grasshopper

c)

Owl

d)

Leaf

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