REBECAH here :)

What causes eclipses? check all that apply. earth's rotation on its axis moon's shadow covering the sun earth's shadow covering the moon earth's orbit and moon's orbit occasionally aligning the moon and sun's gravity pulling in the same direction

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000

In what ways does the study of human population differ from the study of wildlife ecology