My Science Library Educational Media Rourke How Ecosystems Work by Julie K Lundgren Science Content Editor Shirley Duke rourkeeducationalmedia com Teacher Notes available at rem4teachers com
Balanced System A tree A forest A pond An ocean We can call each an ecosystem We can describe the connections between the plants animals and nonliving things in ecosystems 4
We can call a single tree and all that lives in its branches an ecosystem 5
