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Ecosystems Pt. 1

Total questions: 45

Worksheet time: 3hrs 28mins

Name
Class
Date
1.
The diagram shows an example of what kind of organism
a)
Autotroph
b)
Heterotroph
c)
Decomposer
d)
Herbivore
2.

Match the following

a)

producers

1.

organisms that create their own food through photosynthesis

b)

consumers

2.

organisms that consume other organisms

c)

decomposers

3.

organisms that break down matter such as the remains of organisms

3.

Match the following

a)

producers

1.

make their own food

b)

1st level consumers

2.

eat producers

c)

2nd level consumers

3.

eat 1st level consumers

d)

3rd level consumers

4.

eat 2nd level consumers

e)

4th level consumers

5.

eat 3rd level consumers

4.

Which of the following is not shown as a primary consumer

a)

black bear

b)

beaver

c)

pine vole

d)

bobcat

5.

This chart is called a

a)

Lifespan

b)

Water Cycle

c)

Growth Chart

d)

Food Chain

6.

What is the source of all energy on Earth?

a)

The Sun

b)

Producers

c)

Consumers

d)

The Teacher

7.
An animal that eats BOTH animals and plants is called an
a)
Herbivore
b)
Omnivore
c)
Carnivore
d)
Habitat
8.

An animal that ONLY eats plants is called a

a)

Herbivore

b)

Carnivore

c)

Omnivore

d)

Plantivore

9.

An animal that ONLY eats other animals is called a

a)

Carnivore

b)

Omnivore

c)

Herbivore

d)

Consumer

10.

Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?

a)

There would be a decrease in the small bird population.

b)

There would be a decrease in the grass/flowers population.

c)

There would be a decrease in the mice population.

d)

There would be an increase in the grass/flowers population.

11.
How do producers obtain energy?
a)
They conduct photosynthesis.
b)
They consume plants.
c)
They consume primary consumers.
d)
They consume secondary consumers.
12.
Use the diagram to answer the question.
The Mayfly is a food source for which 3 organisms?
a)
Frog, Dragon Fly and snake
b)
Frog, trout and dragon fly
c)
Frog, salamander and trout
d)
Frog and phytoplankton
13.
What are plants called in a food chain?
a)
Producers
b)
Consumers
c)
Decomposers
d)
Scavengers
14.
What are animals called in a food chain?
a)
Producers
b)
Consumers
c)
Decomposers
d)
Plants
15.
What is the role of decomposers in a food chain?
a)
Use sunlight to make food
b)
Eat other organisms to gain energy
c)
Make the food for the whole food chain
d)
Break down dead organisms and add nutrients to the soil
16.
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
17.
Which organism do the owl and the weasel compete for in the food web?
a)
Hawk
b)
Spider
c)
Grasshopper
d)
Shrew
18.
These mushroom are heterotrophs and must therefore get nutrients from other organic matter. Mushroom aslo act as ____________________ in many food webs.
a)
Herbivore
b)
Decomposer
c)
Carnivore
d)
Omnivore
19.
An environmental change that removed which of these organisms from the ecosystem would cause the most instability in the ecosystem?
a)
Auklets
b)
Foxes
c)
Salmon
d)
Zooplankton
20.

Different students drew illustrations of the flow of energy in an ecosystem.

Which student is most accurate?

a)

Student 1

b)

Student 2

c)

Student 3

d)

Student 4

21.
Which animal is a tertiary consumer?
a)
Jackal
b)
Wild Cat
c)
Lion
d)
Owl
22.

What level consumer is the deer?

a)

primary

b)

secondary

c)

tertiary

d)

producer

23.
What is a food web?
a)
a web created by a spider to trap its food
b)
a network of food chains in an ecosystem
c)
a community of plants and animals
d)
the food that one animal eats
24.
What do you call an animal that hunts and eats other animals?
a)
Prey
b)
Producer
c)
Predator 
d)
Decomposer 
25.
If an animal becomes extinct, which part of the food chain is affected? 
a)
The whole food chain is affected
b)
Only animals at the top of the food chain are affected 
c)
Only animals at the bottom of the food chain are affected 
26.
What do Omnivores eat?
a)
Meat
b)
Plants 
c)
Meat and plants 
d)
Only meat 
27.
An ordered arrangement of animals and plants in which each feeds on the one below it in the chain is called:
a)
Habitat
b)
Population
c)
Food Chain
d)
Food Web
28.
Which one is NOT an example of a decomposer?
a)
mushroom
b)
leaves
c)
mold
d)
worm
29.
The arrows in a food chain or web represents what?
a)
They point to the organism that is being eaten.
b)
It shows how sunlight flows within an ecosystem.
c)
They show what direction the energy is flowing between organisms. 
d)
They represent how water is transferred within a habitat.
30.
Eat primary consumers (can be carnivores and omnivores)
a)
Tertiary Consumers
b)
Secondary Consumers
c)
Quaternary Consumers 
d)
Top Predators 
31.
The process of plants using energy from the sun to create the first trophic level is called?
a)
Photosynthesis
b)
Chemosynthesis
c)
Cellular Respiratation
d)
Primary Producers
32.

Click on the picture to answer the question. What is true about a food chain?

a)

It is just 1 path of energy.

b)

It is all possible energy paths.

33.

Look carefully at the image. If energy is lost as it moves up the food chain, what trophic level has the most amount of energy?

a)

1st level - producers

b)

2nd level - primary consumers

c)

3rd level - secondary consumers

d)

4th level - tertiary consumers

34.

What is the sun's role in the energy pyramid?

a)

to produce chemical energy for the ecosystem.

b)

to provide radiant energy for producers to convert to chemical energy.

c)

to start the energy flow of the ecosystem.

d)

to provide mechanical energy for producers to convert to chemical energy.

35.

Match the following

a)

Producers

1.

Plants

b)

1 consumer

2.

Rabbit

c)

2nd Consumer

3.

Snake

d)

Tertiary consumer

4.

Hawk

36.
Which animal is the apex predator?
a)
hawk
b)
lizard
c)
snake
d)
grass
37.
Which animal is not the apex predator but, a predator to a mouse?
a)
hawk
b)
rabbit
c)
snake
d)
grass
38.
Use the diagram to answer the question.
The trout is a source of food for the human and the eagle. When there are more than one organism vying for the same source we call this____?
a)
Population
b)
Resources
c)
Community
d)
Competition
39.

Which of the animals in this food web is an omnivore? (choose 2)

a)

Raven

b)

Snowshoe Hare

c)

Bison

d)

Grizzly Bear

40.
All of the living and nonliving things in an area that interact with each other are called a/an ______.
a)
community
b)
habitat
c)
population
d)
ecosystem
41.

A simple chain that shows the of the flow of energy (what eats what). It starts with the sun.

a)

trophic level

b)

trophic cascade

c)

food web

d)

food chain

42.

Each step or level in a food chain or food web.

a)

trophic level

b)

trophic cascade

c)

food web

d)

food chain

43.

A side-effect when a certain species that usually helps to keep the entire ecosystem balanced is reduced or removed. When their numbers are changed there is an ecological imbalance.

a)

trophic level

b)

trophic cascade

c)

food web

d)

food chain

44.

The role or job of an organism in an ecosystem.

a)

Predator

b)

Prey

c)

Predation

d)

Niche

45.

Sea otters are key to protecting coastal kelp forests but consuming sea urchins. Sea otters are which type of keystone species?

a)

predator

b)

prey

c)

plant

d)

ecosystem engineer

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