WorksheetsEcosystems Unit Review
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
Which is a difference between abiotic and biotic factors?
a)
Abiotic factors are plants and biotic factors are animals.
b)
Biotic factors are plants and abiotic factors are animals.
c)
Abiotic factors are all living things and biotic factors are all nonliving things.
d)
Abiotic factors are all nonliving things and biotic factors are all living things.
2.
Which best describes a desert during the day?
a)
cold and wet
b)
cold and dry
c)
hot and wet
d)
hot and dry
3.
Which ecosystem contains the largest mammals?
a)
ocean
b)
pond
c)
river
d)
swamp
4.
Which could be a challenge for a small animal living in a grassland ecosystem?
a)
The frozen ground is too hard to serve as shelter.
b)
The flat terrain makes it easy for predators to spot prey.
c)
The extreme temperatures require thick skin and heavy fur.
d)
The high amounts of precipitation create excess water resources.
5.
An ecologist is comparing two different ecosystems and creates the following list of similarities:
aquatic diverse fish
life
high salt concentration
plentiful light at the water’s surface
Which two ecosystems was the ecologist most likely comparing?
aquatic diverse fish
life
high salt concentration
plentiful light at the water’s surface
Which two ecosystems was the ecologist most likely comparing?
a)
ocean and lake
b)
estuary and ocean
c)
grassland and pond
6.
Which factor do forest and grassland ecosystems most likely have in common?
a)
the type of climate
b)
the amount of trees
c)
the soil composition
d)
the variety of organisms
7.
How do decomposers recycle dead trees?
a)
by releasing oxygen
b)
by turning them into soil
c)
by turning them into producers
d)
by making them food for consumers
8.
Which is the most important effect of decomposers recycling dead plants and animals?
a)
The process prevents bad odors.
b)
The process adds nutrients to soil.
c)
The process removes objects from Earth.
d)
The process produces food for consumers.
9.
Which group includes only decomposers?
a)
spider, fungi, and grass
b)
ladybug, spider, and deer
c)
sunflower, tree, and grass
d)
fungi, bacteria, and worms
10.
In a food web, how are consumers most often described?
a)
by their size
b)
by their color
c)
by the food they eat
d)
by the way they eat
11.
Which best describes the producers of an ecosystem?
a)
They provide food to herbivores.
b)
They provide food to decomposers.
c)
They provide hydrogen to the atmosphere.
d)
They provide carbon dioxide to the atmosphere.
12.
Which best describes the role of a first-level consumer in an ecosystem?
a)
Consumers eat producers and pass the energy along in an ecosystem.
b)
Consumers eat scavengers and pass the energy along in an ecosystem.
c)
Consumers eat decomposers and pass the energy along in an ecosystem.
d)
Consumers eat other consumers and pass the energy along in an ecosystem.
13.
Which group of organisms eats other living things in order to survive?
a)
producers
b)
consumers
c)
scavengers
d)
decomposers
14.
In what way do bushes benefit from bears eating their berries?
a)
Their seeds are spread around.
b)
Other predators are scared away.
c)
Nearby ground becomes compacted.
d)
Their stems and branches are broken.
15.
It is common to see wild animals like deer and coyotes in large cities and neighborhoods. Which is most likely a reason the animals are found in these areas?
a)
They prefer to be near houses.
b)
They prefer to be near people.
c)
Their habitat is increasing in size.
d)
Their habitat is decreasing in size.
16.
Ariel caught a blue crab while she was at the beach with her family. She wanted to take it home and place it in her pond, but was told the crab would not survive. What is the most likely reason the crab needs the ocean to survive?
a)
There is more sunlight.
b)
There are fewer predators.
c)
The crab needs less oxygen.
d)
The crab needs the saltwater.
17.
A zebra eats grass and then is eaten by a lion. Which is the predator in this situation?
a)
grass
b)
lion
c)
sun
d)
zebra
18.
In a food chain, foxes are consumers of rabbits and mice. If the mice population suddenly decreases, what will most likely happen to the number of foxes?
a)
The number of foxes will increase because they will eat fewer rabbits.
b)
The number of foxes will stay the same because they will eat more rabbits.
c)
The number of foxes will decrease because they will be eaten by the rabbits.
d)
The number of foxes will decrease because they will only have one remaining food source.
19.
What is another word for sugar?
a)
sweet
b)
glucose
c)
Mrs. Torian
20.
What is Mrs. Torian's favorite drink?
a)
Coffee
b)
Water
c)
Diet Coke
d)
Diet Dr. Pepper
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