HELP Cell defense worksheet

(amoeba sisters video recap: pedigrees and need

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?

Which situation is an example of not doing work? lifting a couch throwing a baseball running up stairs carrying a box