All the bats living in a cave form a of bats in the cave ecosystem.

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of

If you put a helium-filled balloon in the refrigerator, what will happen?