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8.L.3.1 ECOSYSTEMS
Test Description: SCHOOL NET
Instructions: Answer all questions to get your test result.
1) Which of these is an abiotic element of a desert ecosystem?
A
scorpion
B
cactus
C
sand
D
lizard
2) An aquarium, containing 10 fish gains 10 more fish. What is most likely to happen to the fish?
A
They will suffer because the water will be too warm with so many fish.
B
They will thrive because of the additional fish.
C
They will suffer because the space is not increased.
3) “Lions are predators to antelopes in many African ecosystems.” Which is best being described?
A
a population shift
B
an abiotic factor
C
the lion’s niche
4) What term describes how a species meets its need for food and shelter and how it reproduces?
A
niche
B
habitat
C
environment
5) Which are major abiotic factors that determine the types of plants that can grow in an ecosystem?
A
precipitation and temperature
B
birds and bees
C
precipitation and bees
6) When space is limited in an ecosystem, how is a bird population most likely affected?
A
competition decreases
B
survival rate increases
C
availability of nesting spots decreases
D
availability of food increases
7) Which is the place where a member of a population lives and finds food?
A
population
B
space
C
habitat
D
shelter
8) Under which condition would a population most likely increase?
A
The number of deaths exceeds the immigration rate.
B
The amount of available resources exceeds the carrying capacity.
C
The carrying capacity exceeds the habitat area.
D
The number of deaths exceeds the number of births.
9) Some caterpillars need big wide leaves to wrap up in when undergoing metamorphosis. Which is the limiting factor when there is a shortage of this kind of leaf?
A
space
B
water
C
shelter
D
food
10) Mice, rabbits, bobcats, and squirrels all live in a brush ecosystem. Which animal would have the most difficult time surviving if the population of the other three animals continued to decrease?
A
squirrel
B
rabbit
C
bobcat
D
mouse
11) In a forest ecosystem food chain if the green plants are destroyed in a forest fire, which short-term effect will this have on the organisms in this food chain?
A
There would be more green plants for the rabbits to eat.
B
There would be an increase in the coyote population
C
There would be fewer rabbits for the coyotes to eat.
D
The mountain lions would have to begin to eat green plants.
12) When would water be a limiting factor in an ecosystem?
A
when a population contains many predators
B
when a population is small
C
when a population is approaching the carrying capacity
D
when a population is decreasing
13) Which does every organism in an ecosystem need for survival?
A
soil
B
plants
C
water
D
animals
14) Which best describes the carrying capacity in an ecosystem?
A
the number of individual organisms the environment can support in a given area
B
the amount of resources that are needed by a population of organisms
C
the amount of habitat areas that are available in a given area
D
the number of organisms moving in and out of a population
15) Estuaries often have marsh grasses that act as a safe nursery for young fish. Which limiting factor, provided by estuaries, does this describe?
A
food
B
space
C
predators
D
shelter
16) If the primary food source for the whale population in an area is depleted, which will most likely happen?
A
The whale population will increase.
B
Starvation will cause the whales to become extinct.
C
Competition among the whales will increase.
D
The whale population will stabilize.
17) Which best determines the number of wolves that can live in an area?
A
the number of trees in the area
B
the amount of snow in the area each year
C
the amount of food available in the area
D
the number of birds that live in the area
18) If wolves prey on deer for food, what will most likely happen to the deer population if wolves are removed from an area where deer live?
A
The population of deer will increase.
B
The population of deer will become extinct.
C
The population of deer will decrease.
D
The population of deer will remain the same.
19) Which best describes the limiting factors on a population in an ecosystem?
A
food, shelter, space, water
B
food, shelter, sunlight, water
C
food, carbon dioxide, shelter, water
*select an answer for all questions
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