Food Webs Gizmo

In the stable food chain shown, what would you expect to happen initially if you were to suddenly double the population of rabbits?

• The populations of the other three species would also increase.

• The populations of the other three species would decrease.

• The grass population and hawk population would decrease. The snake population would increase.

• The grass population would decrease. The snake population and hawk population would increase.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

If a disease strikes the snake population in the food chain shown, what will be the initial effect on the populations of hawks and rabbits?

• The population of hawks will decrease. The population of rabbits will increase.

• The population of hawks will increase. The population of rabbits will decrease.

• The populations of hawks and rabbits will increase.

• The populations of hawks and rabbits will decrease.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

What most likely caused the rabbit population to decrease over the first time unit shown in the following graph?

• A higher than normal population of snakes.

• An increasing population of hawks.

• A decreasing population of grasses.

• A disease in the population of rabbits.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Trapping has severely reduced the population of rabbits in an ecosystem, as shown in the bar graph. What is the most likely effect this will have on other organisms?

• The grass, rabbit, snake, and hawk populations will all decrease rapidly.

• The grass population will decrease rapidly and the snake population will increase rapidly.

• The hawk population will increase rapidly and the rabbit population will decrease rapidly.

• The snake population will decrease rapidly and the grass population will increase rapidly.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

What event within the food chain might lead to the graph shown?

• It is impossible to tell which of the above occurred.

• A disease in the population of hawks.

• A disease in the population of snakes.

• A disease in the population of rabbits.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4