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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
nitrogen
D
water
2) During cellular respiration, organisms give off
A
carbon dioxide
B
nitrogen
C
oxygen
D
sugar
3) What is the source of energy for most plants?
A
sunlight
B
animals
C
water
D
clouds
4) The shortest food chains consist of
A
two producers
B
a producer and a decomposer
C
two consumers
D
a consumer and a decomposer
5) Which describes both a food chain and a food web?
A
both contain only consumers
B
both must include a carnivore
C
both begin with a producer
D
both contain multiple ways that energy flows
6) The relationship between an owl and a mouse is an example of
A
producer and consumer
B
symbiosis
C
competition
D
predator and prey
7) Which event would cause an ecosystem to change quickly?
A
a climate change
B
a rock becoming soil
C
a lake drying up
D
an earthquake
8) Nonnative animal populations can grow rapidly in a new ecosystem because
A
they have no competition for resources in the ecosystem
B
nonnative species are always at the top of food chains
C
predators in the ecosystem are not used to hunting them
D
they are predators
9) Why is a producer important in an ecosystem?
A
Other organisms can hide in the producer.
B
They are prey for animal organisms.
C
All decomposers need to eat producers.
D
It makes energy that other organisms in the ecosystem can use.
10) Why are consumers important to an ecosystem?
A
They are decomposed very rapidly.
B
They are all predators.
C
They control producer populations and provide some energy for decomposers.
D
They consume all of the energy from the producers.
11) Why are decomposers important to an ecosystem?
A
They return minerals to the soil for producers.
B
They carry energy to consumers.
C
They create energy from sunlight.
D
They turn rocks into soil for producers.
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
It can't, since most predators eat a variety of animals.
D
All species in the ecosystem would die.
*select an answer for all questions
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