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WorksheetsEcosystem Review
Total questions: 25
Worksheet time: 30mins
True or False:
Organisms are living things
true
false
What is a producer?
organism that cannot make their own food so they eat other organisms
organism that makes their own food
organism that break down dead organisms
What is a decomposer?
an organism that breaks down dead organisms for energy
an organism that makes its own food
an organism that eats other organisms
Does a food chain start with the sun?
yes
no
What is a consumer?
an organism that breaks down dead organisms
an organism that makes its own energy and food
an organism that eats other organisms for energy
What is a food web?
a model that contains many food chains
a model that contains one food chain
a model that shows where the sun gets its energy
a model that shows how decomposers break down organisms
True or False:
A food web shows how energy flows through an ecosystem
true
false
What is the source of all energy?
water
food
decomposers
sun
What do the arrows in a food web show?
who is the most powerful
the next organism that uses the energy
the prey
the sun
Why do scientists study how animals get their food?
to know what their favorite meal is
so that they understand how energy flows in an ecosystem
to understand why consumers are stronger than decomposers
In a food chain, what comes after a producer?
the sun
a decomposer
a consumer
What is the last thing in a food chain?
a consumer
the sun
a decomposer
a producer
Which of these living things is a producer?
horse
cow
fly
grass
Explain the flow of energy in this food chain (who passes energy to who).
The hawk gives energy to the snake. The snake gives energy to the mouse. The mouse gives energy to the grasshopper who gives energy to the grass.
The mouse gives energy to the hawk. The snake gives energy to the grasshopper. The grass gives energy to the snake.
The grass gives energy to the grasshopper. The grasshopper gives energy to the mouse. The mouse gives energy to the snake who gives energy to the hawk.
Using the web, which best describes the role of the salmon?
The salmon is a producer because it makes it's own food.
The salmon is a decomposer because it eats krill.
The salmon is a consumer because it eats krill.
The salmon is a producer because it eats krill.
What would most likely happen if the owls became extinct?
The number of mice would increase while the number of insects would decrease.
The number of mice and insects would increase.
The number of mice and insects would decrease.
The number of insects would increase and the number of mice would decrease.
This graph shows the size of two populations. One is moose and one is bear. Using the graph, which statement describes the changes in the ecosystem from June to October?
When the population of the bear became over-abundant, the population of moose increased.
When the population of the bear became scarce, the population of the moose decreased.
When the population of the bear became over-abundant, the population of moose decreased.
When the population of the bear became scarce, the population of the moose stayed the same
What does scarce mean?
Too many of one organism.
The organism no longer exists.
The population of the organism stayed the same.
There are only a few of the organisms around.
What does over-abundant mean?
Too many of one organism in an ecosystem.
Too few of an organism in an ecosystem.
An organism that no longer exists.
An organisms population that hasn't changed.
What does extinct mean?
Too many of an organism in an ecosystem,
An organism that no longer exists.
Very few organisms in an ecosystem.
No change to the organism's population.
A student made a model of a pond ecosystem. The student labeled the mushrooms as decomposer. What support the student labeling the mushroom as a decomposer?
Mushrooms consume frogs.
Mushrooms produce their own food.
Mushrooms like frogs, consume grasshoppers.
Mushrooms breaks down dead animals and materials.
A student wrote the following notes to describe the role of organisms in a forest ecosystem.
Producer-Grass- Makes their own food
Consumer- Deer- breaks down dead material
Decomposer- Bacteria- eats another living thing
Another classmate noticed something they needed to change. What should the feedback be?
The description for Decomposer and Consumer should be swapped. A consumer eats other living things and decomposers break down dead material.
The description for producers and consumers need to be swapped. Consumers make their own food and producers break down dead material.
The description for decomposer and producer should be swapped. Decomposers make their own food and producers eat other living things.
The description for consumer needs to be changed to say eat another living animal. They do not eat plants. Therefore, a deer should not be a consumer.
Which food chain shows the correct order?
sun ---> grass --> mouse--->snake ---> hawk
grass---> mousee -->sun--->snake ---> hawk
sun ---> grass --> snake--->mouse ---> hawk
hawk---> grass --> mouse--->snake ---> sun
What organism provides energy for the corn?
All of the animals. When they die they provide nutrients for the soil.
None of the animals, corn gets it's energy from the sun.
None of the animals, plants get their energy from nutrients in the soil.
The mouse gives energy to the corn.
A lot of new houses are built in part of this ecosystem. A lot of rabbits left the ecosystem. Which of the following is most likely occur if rabbits are scarce?
The population of carrots will increase.
The fox population will decrease.
The owls will decrease.
The grasshoppers will increase.
