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Balance in an ecosystem

Total questions: 15

Worksheet time: 15mins

Name
Class
Date
1.
If the population of prey increases, the population of predators will ________because of the availability of food.
a)
decrease
b)
stay the same
c)
increase
2.
A meadow has too many rabbits. What would help balance this ecosystem?
a)
more rain that grass needs
b)
more foxes that eat rabbits
c)
fewer foxes that eat rabbits
d)
more grass for the rabbits to eat
3.
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.
4.

The dying out or extermination of a species.

a)

keystone species

b)

extinction

c)

endangered species

d)

habitat destruction

5.

A species of animal or plant that is seriously at risk of disappearing from the planet.

a)

keystone species

b)

extinction

c)

endangered species

d)

habitat destruction

6.
What type of succession is shown going from figure A to figure B?
a)
primary succession
b)
ecological succession
c)
secondary succession
d)
intermediate
7.
What is the order of succession shown in this figure?
a)
A, B, C, D
b)
B, A, D, C
c)
C, D, A, B
d)
D, A, B, C
8.
The picture shows what type of succession?
a)
primary
b)
secondary
c)
tertiary
d)
quadanary
9.
What is the name given to lichen or algae after a primary succession?
a)
pioneer species
b)
volunteer species
c)
founder species
d)
conqueror species
10.
What are examples of pioneer species in a primary succession?
a)
Bushes and Shrubs
b)
Oak trees
c)
Mossess and Lichens 
d)
A rose Bush
11.

Describe how removing a top predator affects the ecosystem

a)

Allows other populations to increase, which causes resources to become scarcer.

b)

Removing to predator will allow the population to have more meat to eat and live off of.

c)

Removing top predator will harm our ecosystem because we will not have animals to eat prey.

12.
Which organism in this food chain would have the most energy?
a)
Grass
b)
Grasshopper
c)
Frog
d)
Python
13.

What would happen if one organism in an ecosystem became extinct?

a)

The ecosystem would be stronger and better overall

b)

The ecosystem would not change at all

c)

All of the organisms in the ecosystem would find a new place to live

d)

The ecosystem would change, but most of the animals and plants would survive.

14.

What would happen if you removed the caterpillar from this food chain?

a)

The mice would be affected

b)

All the animals will be affected

c)

The plant will be affected

d)

Nothing will happen

15.

We need to ...... and ......... the endangered species for future generations.

a)

conserve, preserve

b)

hunt, convert the habitat

c)

cut trees, conserve

d)

burn the forest, preserve