IN A PRAIRIE ECOSYSTEM GIZMO ASSIGNMENT 1. Give an example of a change that the ecosystem was able to recover from and return to equilibrium.

2. Give an example of a change that the ecosystem was not able to recover from. Can you explain why?

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.