Ecosystems Review

Which organisms would receive less energy if rabbits disappeared from this ecosystem?

• toads

• hawks

• snakes

• grasses

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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

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NGSS.MS-LS2-1

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Which food chain model shows an example of how energy moves through an ecosystem? (flow left to right)

• tree leaves - caterpillar- toucan - puma

• mushroom - redwood tree - raccoon - black bear

• worm - carrot - chipmunk - hawk

• plant plankton - dolphin - shrimp - mackerel

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NGSS.MS-LS2-3

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

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NGSS.MS-LS2-3

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

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NGSS.MS-LS2-3

Here is a model of a food chain in Yellowstone National Park:

shrubs/grasses -- elk -- wolves

In the past, wolves were hunted to extinction. Which statement would describe the park at that time?

• there were many more elk and fewer plants

• there were many more elk and more plants

• there were fewer elk and more plants

• there were fewer elk and fewer plants

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NGSS.MS-LS2-1

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What would happen if fungi were removed from a forest ecosystem?

• More oxygen would be created for other organisms

• the population of plants and grasses would quickly grow

• hawks and rabbits would have less competition for food

• plant and animal matter would no longer be broken down

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NGSS.MS-LS2-1

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What would most likely happen to the populations of organisms in a forest ecosystem if there were no rain for a long period of time?

• grass and tree populations would increase because they only need sunlight and soil to get nutrients

• all the populations in the forest would remain the same because the amount of rainfall only affects non-living factors

• hawk and rabbit populations would increase because they would not have to compete with plant populations for water

• all the forest populations would decrease because producers would not be able to survive to supply nutrients to consumers

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

What part of the forest ecosystem receives energy from the rabbits?

• the Sun

• the hawks

• the trees

• the grasses

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NGSS.MS-LS2-3

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

Tags

NGSS.MS-LS2-1

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