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Food Chain (Gizmo)

Last updated about 4 years ago
41 questions
1

Which organism is a producer in this food chain?

1

Where does the producer get its energy?

1

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

1

Hawks

1

Snakes

1

Rabbits

1

Grass

1

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

1

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

1

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

1

Doubling rabbit population : Grass

1

Doubling rabbit population: Snakes

1

Doubling rabbit population Hawks

1

Halving rabbit population: Grass

1

Halving rabbit population: Snakes

1

Halving rabbit population: Hawks

1

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

1

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

1

Doubling snake population

1

Doubling snake population

1

Doubling snake population

1

Halving snake population: Grass

1

Halving snake population: Rabbits

1

Halving snake population: Hawks

1

Doubling hawk population: Grass

1

Doubling hawk population: Rabbits

1

Doubling hawk population: Snakes

1

Halving hawk population

1

Halving hawk population

1

Halving hawk population

1

How did increasing the snakes affect the grass?

1

Explain why:

1

How did increasing the hawks affect the rabbits?

1

Explain why:

1

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

1

What effect did removing predators have on prey?

1

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?

1

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.

1

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

1

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

1

A major disturbance that caused the ecosystem to completely collapse.