Classify these animals as vertebrates or invertebrates. starfish: amphibian: bird: octopus: coral: fish: clam: reptile:

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?

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?