What I learned about ecosystems is that they can be destroyed, for example, Yellowstone national park had grey wolves. They became extinct in the national park. Eco-columns can get effected by pollution. Pollution isn't good for animals and all living things. A p.H. scale is when you see how polluted something is and how something isn't. You can tell if something is polluted because the p.H. is too high or too low.
An Eco-system is a place like earth. Seattle has a lot of Eco-systems, for example, Seward Park, Mount Baker and Madrona are Eco-systems. If you are wondering what an Eco-system has to have, it needs to have, water, air and grass A.K.A land. When we made the Eco-columns it helped me understand Eco-systems. Our fish and grass all died. I think the fish died because we didn't feed it and the grass died because we did not water it.
Have you ever had an Eco-column?
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