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Food Chain (Gizmo)

Last updated over 4 years ago

41 Nsɛmmisa

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Asemmisa {{asɛmmisaAhyɛnsode}}

37.

Observe: Kill off most of the hawks using the – button, and then click Play. Observe the GRAPH for about 12 months, and then click Pause. What happens?

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Asemmisa {{asɛmmisaAhyɛnsode}}

38.

Experiment: Click Reset. Try making other changes to the ecosystem. Use the + or – buttons, or choose Diseased from the dropdown lists. Click Play and observe for at least 12 months. Record what happens below.

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Asemmisa {{asɛmmisaAhyɛnsode}}

39.

Summarize: Give at least one example of each of the following:
A major disturbance that the ecosystem was able to recover completely from.

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Asemmisa {{asɛmmisaAhyɛnsode}}

40.

A major disturbance that caused the ecosystem to stabilize at a new equilibrium.

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1.

Which organism is a producer in this food chain?

Hawks

Snakes

Rabbits

Grass

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2.

Where does the producer get its energy?

The Ground

The Air

Other animals

The sun

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3.

Consumers must eat other organisms for energy. Which organisms are consumers in this food chain?

Hawks

Snakes

Rabbits

Grass

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4.

Hawks

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5.

Snakes

Asemmisa {{asɛmmisaAhyɛnsode}}

6.

Rabbits

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7.

Grass

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8.

What do you notice about each population as time goes by?

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9.

Notice the populations decrease as you go from the bottom of the food chain to the top. Whydo you think this is so?

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10.

Form hypothesis: How do you think predator and prey populations affect one another?

Asemmisa {{asɛmmisaAhyɛnsode}}

11.

Doubling rabbit population : Grass

Decrease

Increase

No change

D

Asemmisa {{asɛmmisaAhyɛnsode}}

12.

Doubling rabbit population: Snakes

Increase

Decrease

No Change

Asemmisa {{asɛmmisaAhyɛnsode}}

13.

Doubling rabbit population Hawks

Increasse

Decrease

No Change

Asemmisa {{asɛmmisaAhyɛnsode}}

14.

Halving rabbit population: Grass

Increase

Decrease

No Change

Asemmisa {{asɛmmisaAhyɛnsode}}

15.

Halving rabbit population: Snakes

Increase

Decrease

No Change

Asemmisa {{asɛmmisaAhyɛnsode}}

16.

Halving rabbit population: Hawks

Increase

Decrease

No Change

Asemmisa {{asɛmmisaAhyɛnsode}}

17.

How did doubling the rabbit population affect the grass, snakes, and hawks at first?

Asemmisa {{asɛmmisaAhyɛnsode}}

18.

How did halving the rabbit population affect the grass, snakes, and hawks at first?

Asemmisa {{asɛmmisaAhyɛnsode}}

19.

Doubling snake population

Increase

Decrease

No Change

Asemmisa {{asɛmmisaAhyɛnsode}}

20.

Doubling snake population

Increase

Decrease

No Change

Asemmisa {{asɛmmisaAhyɛnsode}}

21.

Doubling snake population

Increase

Decrease

No Change

Asemmisa {{asɛmmisaAhyɛnsode}}

22.

Halving snake population: Grass

Increase

Decrease

No Change

Asemmisa {{asɛmmisaAhyɛnsode}}

23.

Halving snake population: Rabbits

Increase

Decrease

No Change

Asemmisa {{asɛmmisaAhyɛnsode}}

24.

Halving snake population: Hawks

Increase

Decrease

No Change

Asemmisa {{asɛmmisaAhyɛnsode}}

25.

Doubling hawk population: Grass

Increase

Decrease

No Change

Asemmisa {{asɛmmisaAhyɛnsode}}

26.

Doubling hawk population: Rabbits

Increase

Decrease

No Change

Asemmisa {{asɛmmisaAhyɛnsode}}

27.

Doubling hawk population: Snakes

Increase

Decrease

No Change

Asemmisa {{asɛmmisaAhyɛnsode}}

28.

Halving hawk population

Increase

Decrease

No Change

Asemmisa {{asɛmmisaAhyɛnsode}}

29.

Halving hawk population

Increase

Decrease

No Change

Asemmisa {{asɛmmisaAhyɛnsode}}

30.

Halving hawk population

Increase

Decrease

No Change

Asemmisa {{asɛmmisaAhyɛnsode}}

31.

How did increasing the snakes affect the grass?

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32.

Explain why:

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33.

How did increasing the hawks affect the rabbits?

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34.

Explain why:

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35.

Draw conclusions: In general, what effect did removing prey have on predators?

Asemmisa {{asɛmmisaAhyɛnsode}}

36.

What effect did removing predators have on prey?

Asemmisa {{asɛmmisaAhyɛnsode}}

41.

A major disturbance that caused the ecosystem to completely collapse.