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Ecosystems

Total questions: 28

Worksheet time: 24mins

Name
Class
Date
1.
Example of a consumer
a)
worm
b)
bacteria
c)
mushroom
d)
hawk
2.
A tree is a ....
a)
composer
b)
decomposer
c)
producer
3.
A connection of food chains with many food energy paths in an ecosystem is a ____________
a)
ecosystem
b)
food web
c)
environment
d)
population
4.
The shrew provides energy for the _______?
a)
cricket
b)
grasshopper
c)
frog
d)
snake
5.
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.
6.
Where does the energy start in this food chain?
a)
Plant
b)
Sun
c)
Deer
d)
Wolf
7.
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
8.
Which best describes what a food chain shows you?
a)
Energy flow through an ecosystem
b)
Food flowing through an ecosystem
c)
Consumers going into other consumers
d)
Who eats who
9.

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

a)

Producers

b)

Consumers

c)

Decomposers

d)

Organisms

10.
What are animals called in a food chain?
a)
Producers
b)
Consumers
c)
Decomposers
d)
Plants
11.
What are plants called in a food chain?
a)
Producers
b)
Consumers
c)
Decomposers
d)
Scavengers
12.
Which of these organisms would receive energy from the snake?
a)
Plant
b)
Rabbit
c)
Mouse
d)
Hawk
13.

Which of these is true about this food web?

a)

The Owl gets its energy from the producer.

b)

The Lion gets its energy only from a tree.

c)

The Kite gets its energy from the goat.

d)

The Mouse is most likely to die, several ways.

14.

Why might an organism have more than one arrow directed away 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.

d)

They have no resources available to them.

15.
Which organism do the owl and the weasel compete for in the food web?
a)
Hawk
b)
Spider
c)
Grasshopper
d)
Shrew
16.
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.
17.
Identify the correct food chain that demonstrates the energy flow of this food web
a)
Plant > Caterpillar > Bluebird > Eagle
b)
Plant < Rabbit < Eagle
c)
Plant >Lizard > Snail >Eagle
d)
Eagle >Lizard>Caterpillar>Plant
18.
If the grasshopper were to be removed completely from the food web, what organism would be most effected?
a)
The squirrel
b)
The shrew
c)
The deer
d)
The rabbit
19.
In this food chain, what will happen if the frogs become extinct?
a)
The snakes will increase.
b)
The grasshoppers will decrease.
c)
The eagles will remain the same.
d)
The grasshoppers will increase.
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 due to being the only food source for the hawk.

c)

The willow tree population would decrease.

d)

Foxes would dies due to no food source.

21.

Which of the following would have a negative impact on an ecosystem?

a)

constructing highways

b)

planting trees

c)

recycling paper

22.
When a certain population becomes so dense that it harms or changes the quality of life in that environment, we have...
a)
a population
b)
overpopulation
c)
pollution
23.
Which is NOT an example of a natural environmental change?
a)
a beaver dam
b)
a hurricane
c)
a volcanic eruption
d)
a housing development
24.
There are many large-mouth bass, a type of fish, living in a small lake near Waco, Texas. How would increased fishing in the lake effect the lake ecosystem?
a)
Predators of the bass might starve due to loss of a food source
b)
The population of the bass’ prey would decrease.
c)
The bass would spend more time swimming near the surface
d)
Water level in the lake would decrease as more fishing took place
25.
How would an ecosystem change if the rabbits that were the main prey for foxes became sick and died?
a)
The foxes would find new prey.
b)
The number of foxes would increase.
c)
The number of foxes would decrease.
d)
The foxes and rabbits would compete for food.
26.
Which would cause an ecosystem to change quickly?
a)
an earthquake
b)
a lake drying up
c)
a climate change
d)
a lake becoming a marsh
27.
Which type of organism helps return nutrients from dead plants and animals to the soil?
a)
producer
b)
prey
c)
predator
d)
decomposer 
28.
A large amount of oil was spilled in a lake environment. Within a few weeks, the number of plants and animals living in the area where the oil was spilled will most likely.
a)
decrease 
b)
increase 
c)
remain the same 

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