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Ecosystems Review

Total questions: 24

Worksheet time: 24mins

Name
Class
Date
1.
The relationship between seaweed and sea turtles is an example of 
a)
decomposition
b)
predator and prey
c)
competition
d)
producer and consumer
2.
How is a food web different from a food chain?
a)
A food web combines many different food chains.
b)
A food web does not include decomposers whereas a food chain does.
c)
A food web is for insects whereas a food chain is for mammals.
d)
A food web is for insects whereas a food chain is for mammals.
3.
Organism A spends a significant portion of its life in or on organism B.  Organism A causes harm to organism B without immediately killing it.  Which of the following describes this interaction?
a)
parasite/host
b)
predator/prey
c)
carnivore/omnivore
d)
host/parasite
4.
With which abiotic factor does a black bear interact?
a)
salmon
b)
plants
c)
insects
d)
a cave
5.
What is the role of an oak tree in an ecosystem?
a)
It cannot make its own food.
b)
It uses the sun's energy to make food.
c)
It eats other organisms.
d)
It breaks down dead organisms and returns nutrients to the soil.
6.
A forest food chain contains a tree, grasshopper, lizard, bird, and wolf.  Which organism(s) are consumers?
a)
All of the organisms
b)
wolf, lizard, and bird
c)
wolf
d)
wolf, lizard, bird, and grasshopper
7.
Which type of organism "recycles" nutrients back into an ecosystem?
a)
decomposers
b)
consumers
c)
producers
d)
omnivores
8.
A pond ecosystem includes a number of different types of birds, mammals, reptiles, and fish.  All of these different groups make up the ecosystem's
a)
microorganisms
b)
abiotic factors
c)
populations
d)
community
9.
Dan lives in a small rural community several miles from the nearest city.  What do you predict will be the greatest immediate effect that a new housing development will have on the ecosystem surrounding Dan's community?
a)
The increase in traffic cause by the development's residents
b)
The strain on the existing school system caused by population growth
c)
The existing habitat that will be lost in construction of the development
d)
The increase in electricity and water usage required by the development.
10.
A non-native plant in an ecosystem spreads quickly.  This will most likely directly affect the native plants by
a)
leaving them less space
b)
giving them more food
c)
helping them grow
d)
leaving them more sun 
11.

Which of the organisms below would be a producer?

a)

algae

b)

mouse

c)

worm

12.

Which of the following organisms is a consumer?

a)

bacteria

b)

hawk

c)

mushroom

13.

Humans are considered _______________.

a)

consumers

b)

decomposers

c)

producers

14.

A worm is an example of a _______________.

a)

consumer

b)

decomposer

c)

producer

15.

The shrew provides energy for the ________________.

a)

cricket

b)

grasshopper

c)

snake

16.

What do the arrows in a food chain/web represent?

a)

They point to the organism that is being eaten.

b)

They represent how water is transferred within a habitat.

c)

They show what direction the energy is flowing between organisms.

17.

This is an example of a ______________.

a)

food chain

b)

food pyramid

c)

food web

18.

This is an example of a ______________.

a)

food chain

b)

food pyramid

c)

food web

19.

Why might an organism have more than one arrow coming from 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.

20.

What may happen if the snowshoe hare was removed from the food web pictured?

a)

The insects in the habitat would increase.

b)

The shrew population would decrease because the fox would not have as many food sources.

c)

The willow tree population would decrease.

21.

Which of the following is true?

a)

As moose populations rise, wolf populations decrease.

b)

More moose mean less food for wolves.

c)

As wolf populations increase, moose populations decrease.

22.

The energy in the food chain comes from the...

a)

air

b)

water

c)

sun

d)

ocean

23.

A predator...

a)

is often a herbivore

b)

gets energy through photosynthesis

c)

hunts other animals

d)

is always an omnivore

24.

prey...

a)

hunts other animals

b)

is always a carnivore

c)

is always a herbivore

d)

gets eaten by predators

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