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Submitted By gerardoam
Words 505
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Food Chain Gizmo

Answer these on a separate piece of paper.

Conclusion Questions:

1) What happens to an ecosystem when it is not in equilibrium? 2) What are some reasons that can cause an ecosystem to no longer be in equilibrium? 3) What happens to the prey when there are too many predators? 4) What happens to the predators when there is not enough prey? 5) What happens to an ecosystem when the plants have been removed? 6) What impact do you think humans have on ecosystems? 7) What impact do you think diseases can have on an ecosystem? 8) Why is it important that each organism maintains its role in the ecosystem? 9) What would happen to an ecosystem if an entire species of organism was removed?

Food Chain Gizmo

Go to

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User name: mrmorantz
Password: morantz

Using the find gizmo browser on the website, search for Food Chain

Select the Food Chain gizmo

Click on the gizmo tab and wait for it to load

Assessment Questions (5):
Top of Form 1. 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?

* A. The populations of hawks and rabbits will decrease. * B. The populations of hawks and rabbits will increase. * C. The population of hawks will increase. The population of rabbits will decrease. * D. The population of hawks will decrease. The population of rabbits will increase. 2. In the stable food chain shown below, what would you expect to happen initially if you were to suddenly double the population of rabbits?

* A. The populations of the other three species would also increase. * B. The populations of the other three species would decrease. * C. The grass population would decrease. The snake population and hawk population would increase. * D. The grass population and hawk population would decrease. The snake population would increase. 3. What event within the food chain might lead to the graph shown below?

* A. A disease in the population of rabbits. * B. A disease in the population of snakes. * C. A disease in the population of hawks. * D. Its impossible to tell which of the above occurred. 4. What most likely caused the rabbit population to decrease over the first time unit shown in the following graph?

* A. A disease in the population of rabbits * B. A decreasing population of grasses * C. An increasing population of hawks * D. A higher-than-ideal population of snakes 5. Trapping has severely reduced the population of rabbits in an ecosystem, as shown in the bar graph below. What is the most likely effect this will have on other organisms?

* A. The snake population will decrease rapidly and the grass population will increase rapidly. * B. The hawk population will increase rapidly and the rabbit population will decrease rapidly. * C. The grass population will decrease rapidly, and the snake population will increase rapidly. * D. The grass, rabbit, snake, and hawk populations will all decrease rapidly.
Bottom of Form…...

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