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Science 5 Chapter 4 Test
Test Description: Ecosystems
Instructions: Answer all questions to get your test result.
1) During photosynthesis, plants give off
A
nitrogen
B
water
C
oxygen
D
carbon dioxide
2) During cellular respiration, organisms give off
A
sugar
B
carbon dioxide
C
nitrogen
D
oxygen
3) What is the source of energy for most plants?
A
sunlight
B
clouds
C
animals
D
water
4) The shortest food chains consist of
A
a producer and a decomposer
B
a consumer and a decomposer
C
two producers
D
two consumers
5) Which describes both a food chain and a food web?
A
both must include a carnivore
B
both begin with a producer
C
both contain only consumers
D
both contain multiple ways that energy flows
6) The relationship between an owl and a mouse is an example of
A
symbiosis
B
producer and consumer
C
competition
D
predator and prey
7) Which event would cause an ecosystem to change quickly?
A
a rock becoming soil
B
a climate change
C
a lake drying up
D
an earthquake
8) Nonnative animal populations can grow rapidly in a new ecosystem because
A
predators in the ecosystem are not used to hunting them
B
they are predators
C
they have no competition for resources in the ecosystem
D
nonnative species are always at the top of food chains
9) Why is a producer important in an ecosystem?
A
All decomposers need to eat producers.
B
It makes energy that other organisms in the ecosystem can use.
C
Other organisms can hide in the producer.
D
They are prey for animal organisms.
10) Why are consumers important to an ecosystem?
A
They control producer populations and provide some energy for decomposers.
B
They are all predators.
C
They are decomposed very rapidly.
D
They consume all of the energy from the producers.
11) Why are decomposers important to an ecosystem?
A
They create energy from sunlight.
B
They turn rocks into soil for producers.
C
They return minerals to the soil for producers.
D
They carry energy to consumers.
12) How could the removal of one species affect the entire ecosystem?
A
It leaves empty spaces in the ecosystem that nothing can fill.
B
Animals that depend on that species for energy would have to move away or die.
C
All species in the ecosystem would die.
D
It can't, since most predators eat a variety of animals.
*select an answer for all questions
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