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Ecosystems Interactions

Total questions: 32

Worksheet time: 55mins

Name
Class
Date
1.

An animal that eats another animal is called...

a)

Prey

b)

Organism

c)

Predator

d)

Mammal

2.

An animal that gets eaten by another animal is called...

a)

Mammal

b)

Organism

c)

Predator

d)

Prey

3.

This occurs when organisms in a community fight for the same limited resource.

a)

Commensalism

b)

Competition

c)

Mutualism

d)

Symbiosis

4.

The lavender plant serves an important role in the life cycle of the monarch butterfly. Adult monarchs lay their eggs in the lavender plant, and then the monarch caterpillars eat that same plant during their development.

Based on the relationship between monarchs and lavender, what is one reasonable prediction a scientist could make?

a)

If the lavender population goes down, the monarch population will do down.

b)

Population of monarch butterflies should remain constant when lavender population decreases.

c)

A decrease in the lavender population would cause a monarch butterfly population increase.

d)

If the population of lavender remains constant (the same), the monarch butterfly population increases.

5.
The following picture is an example of...
a)
population
b)
community
c)
microorganism
d)
predator
6.
Ava decides to spend the weekend observing the squirrels in the neighborhood. As she watches them, she takes photos and makes notes about their activities. The drawing shows one of the activities she observes. Ava observes the squirrels in many types of interactions. Which of the following is an interaction with an abiotic factor of the environment?
a)
Catching beetles on the lawn
b)
Drinking water from a stream
c)
Burying acorns by an oak tree
d)
Running from a neighbor's cat
7.

An organism, such as a plant that makes its own food.

a)

biotic factor

b)

abiotic factor

c)

terrestrial

d)

producer

8.

an organism that breaks down wastes and the remains of other organisms into simpler substances

a)

food chain

b)

decomposer

c)

consumer

d)

aquatic

9.

the path that energy takes from one organism to another in the form of food.

a)

food chain

b)

decomposer

c)

consumer

d)

aquatic

10.

the food chains that overlap in an ecosystem

a)

food chain

b)

decomposer

c)

food web

d)

aquatic

11.

A consumer that eats meat only

a)

carnivore

b)

decomposer

c)

omnivore

d)

herbivore

12.

A consumer that eats plants only

a)

carnivore

b)

decomposer

c)

omnivore

d)

herbivore

13.

A consumer that eats plants and animals

a)

carnivore

b)

decomposer

c)

omnivore

d)

herbivore

14.

Photosynthesis occurs in the world's ocean mainly by these microorganisms.

a)

phytoplankton

b)

oxygen

c)

fish

d)

bears

15.

What gas does photosynthesis produce that animals must have to survive?

a)

methane

b)

butane

c)

oxygen

d)

carbon dioxide

16.

A habitat is a small group of ducks.

a)

True: It's ducks.

b)

False: It's a place where an organism naturally lives and grows

c)

False: It's a small group of chickens.

d)

False: It's a place where organisms are taken so they can adapt

17.

Students are describing the ecosystem in an area. Which of these lists ALL the components the students should include in their description?

a)

all plant and animal species

b)

all living and non-living factors

c)

all weather patterns and climates

d)

all elements and chemical substances

18.
Eelgrass is a major source of food for birds and turtles in an estuary.  What will most likely happen to the bird and turtle populations if people remove the eelgrass to build a bridge?
a)
The turtle population will increase, but the bird population will decrease
b)
Both the bird population and the turtle population will increase
c)
The bird population will increase, but the turtle population will decrease
d)
Both populations will decrease
19.
In a grassland ecosystem, if the population of eagles suddenly decreased, what will most likely be the effect on the rest of the ecosystem?
a)
The ecosystem will become overpopulated with snakes
b)
There will be a decrease in the population of snakes in the ecosystem
c)
The nutrition of the soil in the ecosystem will decrease
d)
More types of plants will begin growing in the ecosystem
20.
Meadow moles are small mouse-like animals that eat plants and animals. Their niche in an ecosystem is a?
a)
omnivore
b)
herbivore
c)
producer
d)
scavenger
21.
Which best explains why many kinds of plants and animals can live together in an ecosystem?
a)
The plants and animals all care for each other and protect one another.
b)
The plants and animals are all part of a food chain and depend on each other to live.
c)
The plants and animals are independent of one another, so they can live together,
d)
The plants and animals all feed on the same things, so they compete with each other for food.
22.
Which best explains why many kinds of plants and animals can live together in an ecosystem?
a)
The plants and animals all care for each other and protect one another.
b)
The plants and animals are all part of a food chain and depend on each other to live.
c)
The plants and animals are independent of one another, so they can live together,
d)
The plants and animals all feed on the same things, so they compete with each other for food.
23.
Wood ducks build their nests in holes in trees near lakes. If some of the  trees were removed from around the lake, how would the wood ducks be affected?
a)
Wood ducks would become a new species.
b)
Wood ducks would lay more eggs in each nest.
c)
Wood ducks would increase their competition for nests.
d)
Wood ducks would begin building their nests on the ground.
24.
The place in which an organism lives  
a)
habitat
b)
population
c)
ecosystem
d)
niche
25.
What prevents plant growth beneath the trees in thick forests? 
a)
The trees limit the amount of sunlight that is able to reach the ground. 
b)
The roots of the tree make it difficult for plants to grow 
c)
Little water reaches the ground under the trees
d)
Little water reaches the ground under the trees
26.
Which of these is an example of one living thing depending on another living thing?
a)
Cat walking on the sand
b)
Bird building a nest in a tree
c)
Dog warming in the sunlight
d)
Squirrel drinking water
27.
All of the following are examples of living things interacting with each other EXCEPT —
a)
birds preying on insects living in the grass
b)
squirrels spreading the seeds of trees by burying them
c)
frogs sleeping in the mud at the bottom of the pond
d)
fish eating plants and other smaller fish
28.
The Texas Kangaroo Rat, native to north-central Texas, makes its home in mesquite bushes.  If the mesquite bushes are cleared for human homes , which of the following is the most probable result?
a)
The rat population will rise (increase).
b)
The rat population will decline (decrease).
c)
The rat population will stay the same.
d)
The rat population will double.
29.
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.
30.
Which organism do the owl and the weasel compete for in the food web?
a)
Hawk
b)
Spider
c)
Grasshopper
d)
Shrew
31.
The shrew provides energy for the _______?
a)
cricket
b)
grasshopper
c)
frog
d)
snake
32.
Which of the following is a herbivore?
a)
cricket
b)
frog
c)
hawk
d)
shrew

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