4th grade Ecosystems Review

Vocabulary

100

What is the living and nonliving things that interact in an environment? 

an ecosystem

200

What is the name of a consumer that eats plants and animals? 

omnivore

300

What is a diagram that shows several connected food chains? 

a food web

400

What is a producer?

An organism that makes its own food

500

What is a primary consumer? 

 an animal that eats only plants

Food Chains

100

What is the beginning group of all food chains?

producers

200

What is an animal that is hunted for food?

prey

300

What is a living thing that gets energy by eating other animals for food? 

consumers

400

What is a living thing that breaks down dead plants and animals creating nutrients for producers?

decomposer

500

What is an animal that hunts another animal for food?

predator

Food Web 1

100

If there was a drought for many years, what would likely happen to the grass and mice? A. the grass would grow quickly and there would be many mice. B. the grass would grow quickly and there would be less mice. C. the grass would wilt and die and there would be many mice. D. the grass would wilt and die and there would be less mice.

D. the grass would wilt and die and there would be less mice.

200

What ecosystem would you find a dry climate, sand, and cacti year round? A. tropical rain forest B. desert C. arctic D. swamp

B. desert

300

Which of the following do producers need to make their own food? A. sunlight and water B. sunlight, water and oxygen C. sunlight, water and carbon dioxide D. sunlight

C. sunlight, water and carbon dioxide

400

If hawks eat mice, the mice eat grasshoppers and the grasshoppers eat grass, what is most likely to happen if there is a shortage of grasshoppers? A. The number of mice and hawks will increase B. The amount of grass will decrease C. The amount of mice and hawks will decrease D. The amount of mice will increase, but the amount of hawks will decrease

C. The amount of mice and hawks will decrease

500

What is a consumer that eats only animals?

Carnivore

producer, consumer, or decomposer?

100

Which is a decomposer? A. mushroom B. hawk C. mouse D. algae

A. mushroom

200

Which is a producer? A. mushroom B. tree C. blue jay D. fox

B. tree

300

Which is a secondary consumer? A. grass B. mushroom C. wolf D. deer

C. wolf

400

Which shows the steps of the food chain in order? A. consumer, producer, decomposer B. producer, consumer, decomposer C. producer, decomposer, consumer D. decomposer, producer, consumer

B. producer, consumer, decomposer

500

What organism in a food chain would have the GREATEST impact on the whole food chain if it were removed? A. hawk B. snake C. grass D. mouse

C. grass

Food Web 2

100

If a fox and hawk both eat rodents (mice, rats, ect.), what would happen to the rodents if the fox and hawk population doubled? A. the rodent population would increase B. the rodents would move to a different ecosystem C. the rodent population would decrease D. the rodents would have more babies

C. the rodent population would decrease

200

Which list shows all herbivores? A. zebra, elephant, fox B. giraffe, hawk, rabbit C. rabbit, giraffe, zebra D. wolf, fox, lion

C. rabbit, giraffe, zebra

300

Beavers use trees to create dams. Using trees to create dams kills them. What changes can happen in an area which has an over population of beavers?

If the trees die, other consumers will not be able to use the trees as a resource for food energy. The ecosystem may become imbalanced in the area and all living things in the ecosystem will be affected.

400

Food webs are just a model. It doesn't always show what actually happens in nature because- A. the interactions of animals are too complex to show on the web B. it may have some inaccurate information C. Both a and b D. Neither a nor b

C. Both a and b

500

Name one of each: Omnivore: Herbivore: Carnivore: Producer: Decomposer:

O-mouse, fox, people H-zebra, elephant, rabbit C-wolf, lion, shark P-cactus, trees, flowers D-mushroom, snail, worm