Ecosystems
Consumers, Producers, Decomposers
Food Chain
Misc. 1
Misc. 2
100
Which is a similarity of estuaries and oceans?
A. They are both very deep.
B. They are both the same size.
C. They both contain salt water.
D. They both have few predators.
C. They both contain salt water.
100
A river flows beside a forest ecosystem. The model shows some of the organisms that live in the ecosystem.
Which TWO claims about consumers are supported by the model?
A. Algae are consumers that receive matter from the water.
B. Muskrats are consumers that receive matter from otters.
C. Eagles are consumers that receive matter from bears.
D. Frogs are consumers that receive matter from insects.
E. Big fish are consumers that receive matter from little fish.
D. Frogs are consumers that receive matter from insects.
E. Big fish are consumers that receive matter from little fish.
100
A food chain is shown below.
sun → grass → grasshopper → scorpion → kit fox → bacteria
Which organisms are consumers?
A. scorpion and bacteria
B. grass and grasshopper
C. grasshopper, scorpion, and kit fox
D. grasshopper, scorpion, and bacteria
C. grasshopper, scorpion, and kit fox
100
What do the arrows in the model show?
A. The arrows show the organisms losing energy in the ecosystem.
B. The arrows show the movement of organisms living in the forest.
C. The arrows show the movement of matter in the ecosystem.
D. The arrows show the organisms competing for food in the ecosystem.
C. The arrows show the movement of matter in the ecosystem.
100
How do the conditions for plants growing close to the ground differ in grasslands and forests?
A. The plants receive more water in grasslands than they do in forests.
B. The plants receive more sunlight in grasslands than they do in forests.
C. The plants are less affected by wind in grasslands than they are in forests.
D. The plants are less affected by pests in grasslands than they are in forests.
B. The plants receive more sunlight in grasslands than they do in forests.
200
Which characteristic is most likely different when comparing a lake and an ocean ecosystem?
A. Lakes have freshwater and oceans have salt water.
B. Lakes have salt water and oceans have freshwater.
C. Lakes have only mammals and oceans have many types of organisms.
D. Lakes do not have vegetation and oceans have large amounts of vegetation.
A. Lakes have freshwater and oceans have salt water.
200
Decomposers help in…
A. spreading decay in the environment.
B. recycling nutrients back into the environment.
C. controlling large populations in the environment.
D. supplying energy directly to consumers in the environment.
B. recycling nutrients back into the environment.
200
The table lists many organisms and what they eat.
Which of the organisms in the table are carnivores based on how they transfer matter?
A. the grizzly bear and the white tailed deer
B. the elephant and the white tailed deer
C. the red fox and the elephant
D. the alligator and the Bengal tiger
D. the alligator and the Bengal tiger
200
What is missing from the model of the ecosystem?
A. organisms that use matter from water
B. organisms that make their own matter
C. organisms that break down dead matter
D. organisms that receive matter from plants
C. organisms that break down dead matter
200
Which is the correct sequence of energy transfer in an ecosystem?
A. animal – decomposer – sunlight – plant
B. decomposer – sunlight – plant – animal
C. plant – animal – decomposer – sunlight
D. sunlight – plant – animal – decomposer
D. sunlight – plant – animal – decomposer
300
Which correctly compares lakes and ponds?
A. Ponds are usually larger and deeper than lakes.
B. Lakes are usually larger and deeper than ponds.
C. Ponds usually contain salt water, while lakes contain freshwater.
D. Lakes usually have the same temperature from top to bottom, while ponds do not.
B. Lakes are usually larger and deeper than ponds.
300
Which type of organisms get their energy directly from the Sun?
A. Producers
B. Decomposers
C. First-level consumers
D. Second-level consumers
A. Producers
300
A food chain was created using the passage food web, as shown.
Which TWO errors were made when creating the food chain?
A. The Sun should be at the start of the food chain.
B. The grasshopper consumes flower seeds, not grasses.
C. A decomposer should be at the start of the food chain.
D. The food chain is missing a consumer between the grasshopper and hawk.
E. The direction of the flow of energy from producers to consumers is incorrect.
A. The Sun should be at the start of the food chain.
D. The food chain is missing a consumer between the grasshopper and hawk.
300
What BEST describes the relationship between the water, the plants, and the muskrat?
A. The muskrat changes matter in the water into nutrients used by the plants.
B. The plants receive matter from the muskrat and provide matter to the water.
C. The muskrat and the water provide matter that can be used by the plants for growth.
D. The plants change matter in the water into food that can be used by the muskrat.
D. The plants change matter in the water into food that can be used by the muskrat.
300
Which describes an example of an animal helping a plant survive?
A. Bees pollinate flowers in a field.
B. Trees provide shelter for squirrels.
C. Birds build nests of twigs and leaves.
D. Grasses produce seeds for mice to eat.
A. Bees pollinate flowers in a field.
400
Bart made the chart shown below.
Based on the information in the chart above, Z is most likely which ecosystem?
A. estuary
B. lake
C. ocean
D. pond
A. estuary
400
Which is an example of a decomposer that breaks down dead animals and plants?
A. grass
B. hawk
C. mushroom
D. rabbit
C. mushroom
400
A rabbit’s diet consists mostly of grass. Which best describes a rabbit?
A. decomposer
B. carnivore
C. herbivore
D. omnivore
C. herbivore
400
Which organism would be most directly affected by a decrease in the number of producers in a temperate forest ecosystem?
A. deer
B. earthworm
C. hawk
D. wolf
A. deer
400
What is the main source of energy for most food chains on Earth?
A. Water
B. Soil
C. The Sun
D. Air
C. The Sun
500
A simple food chain is shown below.
sun → grass → gazelle → lion
If this ecosystem experienced a drought, how might the gazelle population be impacted?
A. The gazelle population would increase.
B. The gazelles would begin to eat the lions.
C. The gazelle population would begin to decrease.
D. The grass population would take over the gazelle’s habitat.
C. The gazelle population would begin to decrease.
500
How are trees and ferns most similar?
A. Both are producers.
B. Both are consumers.
C. Both are scavengers.
D. Both are decomposers.
A. Both are producers.
500
Rabbits eat alfalfa. What would most likely happen if the rabbit population decreased?
A. There would be more alfalfa for the rabbits to eat.
B. There would be more rabbits to eat all of the alfalfa.
C. There would be less alfalfa because the rabbits were eating it.
D. The habitat would be overpopulated because the rabbits ate more alfalfa.
A. There would be more alfalfa for the rabbits to eat.
500
A major drought has affected an area. Which is most likely to occur?
A. More oxygen will be added to the atmosphere.
B. Less plants will be available as food for animals.
C. More sunlight will be available for photosynthesis.
D. Less carbon dioxide will be added to the atmosphere.
B. Less plants will be available as food for animals.
500
Which of these shows the correct order of a simple food chain?
A. Sun → Deer → Grass → Wolf
B. Grass → Sun → Wolf → Deer
C. Sun → Grass → Deer → Wolf
D. Wolf → Deer → Grass → Sun
C. Sun → Grass → Deer → Wolf