is information acquired by direct observation and measurement using systematic scientific methods.

Sea stars, sea urchins, sand dollars, and brittle stars are all memeber of a group, what is the common name of the group they are all in

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

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