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:
Click Advance year TWO 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 TWO TIMES
Select the DATA tab. Select Pictograph and click the Tree to show the size of the tree population for the past several years.
Question 1
1.
Question 2
2.
Click on the FOREST tab again. Remove ALL organisms except trees. Click Advance year a TWO TIMES and select the DATA tab. Under the DATA tab choose the tree.
Question 3
3.
Question 4
4.
Click the FOREST tab. Click the plus (+) button for mushroom (to add 10 mushrooms).
Click Advance year two times. Select the DATA tab.
Question 5
5.
Question 6
6.
How Bears Affect the Population
Click Reset. Click Advance year a TWO times. Add as many bears to the forest as possible.
Click Advance Year FOUR Times
Select the DATA tab and click on Line Graph
Question 7
7.
Question 8
8.
Question 9
9.
How Deer Affect the Population
Click Reset. Add all the deer to the population.
Click Advance year a THREE times to get to year 3.
Select the DATA tab
Question 10
10.
What happened to the deer population after three years? Explain why the deer population changed.
How did removing the deer affect the tree population?
Number of trees increased
Number of trees decreased
Number of trees remained the same
Under organisms click on Mushroom. How did removing the deer affect the mushroom population?
The number of mushroom increased
The number of mushroom decreased
The number of mushroom remained the same
What happened to the number of trees in the forest?
The number of trees increased
The number of trees decreased
The number of trees remained the same
Are trees producers or consumers?
producers
consumers
Did adding mushrooms negatively affect the tree population?
Yes
No
The mushrooms thrived without hurting trees. How do mushrooms get energy?
mushrooms are producers
mushrooms are primary consumers
mushrooms are secondary consumers
mushrooms are decomposers
What happened to the number of deer when more bears were added?
The number of deers increased
The number of deers decreased
The number of deers did not change
What happened to the number of trees when more bears were added?
The number of trees increased
The number of trees decreased
The number of trees did not change
Can the bear population survive if there are no deer in the population (try it out by removing all the deer)?