WorksheetsEcosystems Unit Test Review
Total questions: 33
Worksheet time: 17mins
Name
Class
Date
1.
Which sentence best describes the food chain below?
algae ---> plankton ---> fish ---> bird
a)
The algae eat the plankton, the plankton eats the fish, and the fish eats the bird
b)
The algae eat the plankton, the fish, and the bird
c)
Energy is passed from the algae to the plankton, the plankton to the fish, and the fish to the bird
2.
Adam is studying a biome for school and discovers this biome is made up of salt and freshwater. Which biome is Adam most likely studying?
a)
Estuary
b)
Lake
c)
River
d)
Ocean
3.
What is the original source of all energy?
**Your answer should only be 1 word and it should begin with a capital letter**
(a)
4.
Which type of animal usually eats both producers and consumers?
a)
an omnivore
b)
a carnivore
c)
a herbivore
d)
a predator
5.
Which has the greatest effect on the amount of salt in a salt marsh?
a)
the number of animals living in the marsh
b)
the closeness of the marsh to the ocean
c)
the depth of the water in the marsh
d)
the temperature of the water in the marsh
6.
Which classification best describes herbivores?
a)
producers
b)
consumers
c)
predators
d)
decomposers
7.
What will be most affected if the decomposers in an ecosystem are removed?
a)
the spread of disease
b)
the availability of water
c)
the quality of the soil
d)
the distribution of organisms
8.
This is a food chain that includes grass, a grasshopper, and a bird.
grass ---> grasshopper ---> bird
How is the grass in this food chain best described?
a)
It is a producer, because it makes its own food.
b)
It is a producer, because it is eaten by consumers.
c)
It is a consumer, because it gets energy from producers.
d)
It is a decomposer, because it breaks down sunlight.
9.
Which would most likely cause a decrease in a population of herbivores?
a)
an increase in the number of producers
b)
a decrease in the types of decomposers
c)
an increase in the types of plants
d)
an increase in the number of carnivores
10.
A mouse eats seeds and insects. Which best describes the role of the mouse?
a)
consumer
b)
decomposer
c)
herbivore
d)
producer
11.
What would most likely result if all plants in an area were destroyed?
a)
Consumer populations would increase because more sunlight would reach the ground.
b)
Decomposer populations would increase because more sunlight would reach the ground.
c)
Consumer populations would decrease because plants provide them with water.
d)
Consumer populations would decrease because plants provide them with energy.
12.
What would most likely happen if all of the decomposers in an ecosystem were removed?
a)
The animals in the ecosystem would die because of the spread of disease.
b)
The plants in the ecosystem would eventually die because of a lack of nutrients in the soil.
c)
The plants in the ecosystem would begin to die out because of a decrease in available water.
d)
The animals in the ecosystem would eat other types of food because of a decrease in producers.
13.
A food chain in an ecosystem includes blackberry bushes, deer, and wolves.
- Deer eat blackberries
- Wolves eat deer
If the population of wolves decreases, how will this affect the population of blackberry bushes?
a)
It will decrease because there will be fewer deer.
b)
It will increase because there will be fewer deer.
c)
It will decrease because there will be more deer.
d)
It will increase because there will be more deer.
14.
Which organisms use energy from the sun to obtain food?
a)
carnivores
b)
herbivores
c)
producers
d)
decomposers
15.
Which would decomposers most likely feed on in a lake?
a)
dead plants
b)
new growing plants
c)
frog eggs
16.
Where are tertiary consumers (apex predators) located on an energy pyramid?
a)
the bottom trophic level
b)
the middle trophic level
c)
the top trophic level
d)
they can be anywhere on the energy pyramid
17.
Bears eat berries, insects, and fish. Based on this information, we know that bears are...
a)
producers
b)
herbivores
c)
carnivores
d)
omnivores
18.
Which organism would be the MOST directly affected if all producers in an ecosystem were destroyed?
a)
producers
b)
herbivores
c)
carnivores
d)
scavengers
19.
Robby catches a frog in his backyard pond and wants to release it into the ocean. Why can't the frog live in the ocean?
a)
frogs need freshwater
b)
frogs need more oxygen
c)
frogs need more sunlight
d)
there are too many predators
20.
Pandas only eat bamboo. What would be a benefit to the panda if their food source doubled?
a)
their population would decrease
b)
their population would increase
c)
their population would stay the same
d)
the bamboo would decrease
21.
What is an omnivore?
a)
an organism that breaks down dead plant and animal material for energy
b)
a consumer that eats only plants for energy
c)
a consumer that eats both plants and other animals for energy
d)
a consumer that eats only other animals for energy
22.
What is a decomposer?
a)
an organism that eats other organisms to get energy
b)
a consumer that eats both plants and other animals for energy
c)
an organism that breaks down dead plant and animal material for energy
d)
an organism that produces its own food for energy
23.
What is a consumer?
a)
an organism that eats other organisms to get energy
b)
a consumer that eats both plants and other animals for energy
c)
an organism that breaks down dead plant and animal material for energy
d)
an organism that produces its own food for energy
24.
What is prey?
a)
a consumer that eats only other animals for energy
b)
an animal that kills and eats other animals for energy
c)
an animal that is killed and eaten by a predator
d)
an organism that produces its own food for energy
25.
What is a predator?
a)
an animal that kills and eats other animals for energy
b)
an animal that is killed and eaten by another animal
c)
a diagram that shows the amounts of energy that flow between organisms in an ecosystem
d)
an organism that produces its own food for energy
26.
What are biotic factors?
a)
the living parts of an ecosystem
b)
organisms that break down dead plant and animal material for energy
c)
organisms that produce their own food for energy
d)
the nonliving parts of an ecosystem
27.
What are abiotic factors?
a)
the living parts of an ecosystem
b)
organisms that break down dead plant and animal material for energy
c)
organisms that produce their own food for energy
d)
the nonliving parts of an ecosystem
28.
What is a habitat?
a)
a group of the same species living in the same place at the same time
b)
a consumer that eats other animals for energy
c)
the specific place where an organism lives
d)
an organism that breaks down dead plant and animal material for energy
29.
What is a community?
a)
all of the nonliving parts of an ecosystem
b)
a group of the same species living in the same place at the same time
c)
all of the living and nonliving things that interact in an area
d)
all of the populations living in the same place at the same time
30.
A population is ________.
a)
the specific place where an organism lives
b)
the nonliving parts of an ecosystem
c)
the role an organism plays in an ecosystem
d)
a group of the same species living in the same place at the same time
31.
What is an ecosystem?
a)
All of the populations living in the same place at the same time
b)
All of the living and nonliving things that interact in an area
c)
A group of the same species living in the same place at the same time
d)
The role an organism plays in an ecosystem
32.
What are terrestrial biomes?
a)
Groups of organisms
b)
Small areas of land that share similar climates, animals, and plants
c)
Small farms that have large fields of crops
d)
Large areas of land that share similar climates, animals, and plants
33.
A rabbit is an herbivore that eats plants. A rabbit is the prey of many predators, like owls and coyotes. A rabbit controls the population of plants in an ecosystem and provides food for many predators. This statement describes the rabbit’s ___________.
a)
Niche
b)
Community
c)
Habitat
d)
Population
100 %
