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