Online College Courses for Credit

Student Exploration- Forest Ecosystem (answers)

Student Exploration- Forest Ecosystem (answers)

Author: Jack Bauer


Student Exploration: Forest Ecosystem

Vocabulary: consumer, decomposer, inorganic, organic, organism, population, producer

Prior Knowledge Questions (Do these BEFORE using the Gizmo.)

When a rancher puts cattle in a pasture, what happens to the amount of grass in it?

If someone adds millions of small fish to a lake, how would the number of big fish change?

Gizmo Warm-up

The Forest Ecosystem Gizmo™ shows you the effects of adding organisms to, or taking them from, a forest. An organism is any living thing. To start, do the following:

Press Reset on the Gizmo.

Click Advance year a couple times to see two years of growth.

Remove all deer from the forest by clicking the minus (-) button until none remain.

Click Advance year a couple more times.

Select the DATA tab. Select Pictograph and click the Tree to show the size of the tree population for the past several years. How did removing deer affect the tree population? Why do you think this happened?

Under Choose organism, select the Mushroom. How did losing deer affect the mushroom population? Explain why this occurred.

Activity A:


Get the Gizmo ready:

Click Reset.
Select the FOREST tab.

Question: What role do trees play in the forest?

Form hypothesis: Where do you think trees get the nutrients they need to grow?

Predict: Based on your hypothesis, how will the tree population change if ALL other organisms (deer, bears, and mushrooms) are removed from the forest?

See More
Fast, Free College Credit

Developing Effective Teams

Let's Ride
*No strings attached. This college course is 100% free and is worth 1 semester credit.

37 Sophia partners guarantee credit transfer.

299 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 32 of Sophia’s online courses. Many different colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.