Name_____________________________________________

Ecosystems

Use complete sentences to answer the following questions.

1. Is a tree an open system or a closed system? How do you know?

It is an open system because it takes in inputs (water and sunlight) and lets out outputs (oxygen, water, fruit).

2. Deer feed on grass and leaves. What might happen to the stability of an ecosystem if there are too many deer?

The plants might become harder for the deer to find. Some deer might starve or be forced to leave the area.