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Biblioteka

Gizmos: Food Chain

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Posljednje ažuriranje about 2 years ago
23 questions

The Food Chain Gizmo shows a food chain with hawks, snakes, rabbits, and grass. In this simulation, the hawks eat snakes, the snakes eat rabbits, and the rabbits eat grass.

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You will need to look at the Gizmo in orde to answer the following questions.

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Get the Gizmo ready. Click on the Reset button. Check that the BAR CHART TAB is selected. .

You are going to first test how increasing and decreasing the rabbit population will affect the other organisms. Add rabbits until the population is around 5000. Click Play, and then Pause after approximately ONE month.

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Click Reset and then decrease the rabbit population (to about 1000). Click Play, and then Pause after approximately ONE month.

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Change the Snake Population. Click the reset button. Add snakes until the population is around 400. Click Play, and then Pause after approximately ONE month.

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Click the reset button. Remove snakes until the population is around 100. Click Play, and then Pause after approximately ONE month

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Pitanje 1
1.

Producers are organisms that do not need to eat other organisms to obtain energy. Click on all the producers in the food chain.

Grass--> Rabbit--> Snake--> Hawk

Pitanje 2
2.

Consumers are organisms that need to eat other organisms to obtain energy. Click on all the consumers in the food chain.

Grass--> Rabbit--> Snake--> Hawk

Pitanje 3
3.

The SIMULATION pane of the Gizmo shows the current population, or number, of each organism in the food chain. What is the current population of hawks?

Pitanje 4
4.

The SIMULATION pane of the Gizmo shows the current population, or number, of each organism in the food chain. What is the current population of snakes?

Pitanje 5
5.

The SIMULATION pane of the Gizmo shows the current population, or number, of each organism in the food chain. What is the current population of rabbits?

Pitanje 6
6.

The SIMULATION pane of the Gizmo shows the current population, or number, of each organism in the food chain. What is the current population of grass?

Pitanje 7
7.

Increasing the rabbit population caused the grass to

Pitanje 8
8.

Increasing the rabbit population caused the snakes to

Pitanje 9
9.

Increasing the rabbit population caused the hawks to

Pitanje 10
10.

Decreasing the rabbit population caused the grass to

Pitanje 11
11.

Decreasing the rabbit population caused the snakes to

Pitanje 12
12.

Decreasing the rabbit population caused the hawks to

Pitanje 13
13.

Explain why decreasing the rabbit population caused the snake and hawk population to change.

Pitanje 14
14.

Increasing the snake population caused the grass to

Pitanje 15
15.

Increasing the snake population caused the rabbits to

Pitanje 16
16.

Increasing the snake population caused the hawks to

Pitanje 17
17.

Explain why increasing the snake population caused the rabbit and hawk population to change.

Pitanje 18
18.

Decreasing the snake population caused the grass to

Pitanje 19
19.

Decreasing the snake population caused the rabbits to

Pitanje 20
20.

Decreasing the snake population caused the hawks to

Pitanje 21
21.

Explain why decreasing the snake population caused a change in the amount of grass.

Pitanje 22
22.

If the number of hawks doubles, what will happen to the number of rabbits? Explain your answer. (Try the simulation before answering)

Pitanje 23
23.

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