Ecosystems Review

What would most likely happen if farmers started using pesticides that killed the insects living above the ground?

• the flowering plant population would increase

• the rat population would decrease

• the snake population would increase

• the corn population would decrease

A student is developing a model of a prairie ecosystem.

Sun -- grass -- ?? -- snake -- owl

What organism could the student use to finish their model and replace the ??

• aspen trees

• buffalo

• foxes

• prairie dog

In a tropical rainforest, energy from the Sun would first flow to a

• consumer, such as an anteater, and then to a decomposer, such as a fungus

• decomposer, such as an earthworm, and then to a producer, such as a vine

• producer, such as an orchid, and then to a consumer, such as an ant

• consumer, such as a rat, and then to a consumer, such as a jaguar

All food chains begin with energy from the sun.

• True

• False

In an ecosystem, consumers are the organisms that only eat plants.

• True

• False

What is the meaning of the word "community" in science?

• all of the living things in a place

• a place where only plants live

• all of the nonliving things in a place

• a place where only people live together

Developers cleared a small forest to build an apartment complex. As a result, the habitat for hawks significantly decreased. Since hawks eat mice, what is most likely to happen to the mice population now that the hawks have fewer places to live?

• the population of mice will move to another area

• the population of mice will increase

• the population of mice will remain the same

• the population of mice will decrease

How would scientists model a food chain to show the flow of energy in a desert ecosystem? (flow left to right)

• lizards -- cacti -- Sun -- insects -- foxes

• Sun -- cacti -- insects -- lizards -- foxes

• foxes -- lizards -- insects -- cacti -- Sun

• insects -- Sun -- cacti -- foxes -- lizards

Producers get their energy from the decomposers of the ecosystem.

• True

• False

Which of the following would MOST LIKELY lead to a decrease in the mouse population?

• an increase in the number of decomposers

• an increase in the deer and frog populations

• a decrease in the snake and hawk populations

• a decrease in the amount of available sunlight