4th grade Ecosystems Review

Food Chains

100

Which of the following describes over abundant? A. Not enough. B. Extinct. C. Consumer. D. Too many

D. Too many

200

What is a producer? A. A consumer that eats only meat B. A consumer that eats only plants C. A carnivore D. An organism that makes its own food

D. An organism that makes its own food

300

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.

400

If there were no decomposers, what would most likely happen? A. Some plants might die because of shortage of important nutrients. B. Plants and animals would remain living longer. C. Consumers would start producing sunlight. D. Chlorophyll will remain for longer periods of time.

A. Some plants may die for shortage of nutrients.

500

How does energy move through an ecosystem from a tree to a wolf? A. The wolf is an herbivore and eats the tree for energy. B. Wolves use leaves to build the dens. C. Energy does not move from a tree to a wolf. D. The tree uses photosynthesis to make it's own food. The leaves are eaten by a deer for energy. The dear is eaten by the wolf for energy. 

D. Tree leaves-deer-wolf

Food Web 1

100

Which of the following describes scarce? A. Too many B. Decomposer C. Not enough D. Over abundant

C. Not enough

200

What is a living thing that gets energy by eating other animals for food? A. producer B. consumer C. decomposer D. sun

B. consumers

300

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

C. rabbit, giraffe, zebra

400

If hawks eat mice, the mice eat grasshoppers and the grasshoppers eat grass, what is most likely to happen if there is a decrease in 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

Wild hogs are an invasive species. They over populate, dig up the roots to trees, and trample grass and young trees. They eat all types of vegetation and nuts from trees. How would a wild hog be harmful to deer in a this area? A. Wild hogs take over and destroy the deer's habitat. B. Wild hogs eat too much of the food the deer eat. C. Wild hogs keep new vegetation from growing and feeding the deer. D. All of the above.

D. All of the above

producer, consumer, or decomposer?

100

What do decomposers provide plants? A. Nutrients B. Protection C. Shade D. Shelter

A. Nutrients

200

Which of the following describes consumer? A. Organisms which are able to make sugars fir energy. B. Organisms that must eat other animals for energy. C. Organisms that must eat other plants and animals for energy. D. Organisms that break down dead bodies and waste.

C. Organisms that eat both plants and animals.

300

What is an organism that makes it's own food? A. predator B. consumer C. decomposer  D. producer

D. producer

400

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

B. sun, producer, consumer, decomposer

500

If the sun were completely blocked so that it no longer provided energy to the plants in a lake, what would happen to the remaining life in the lake? A. Only the animals that eat the plants would die. B. Only the plants would die. C. All the organisms in the lake would die. D. All the carnivores would die?

C. All the organisms in the lake would die