Barry was playing pool. He struck the cue ball (the white ball) with his cue stick. The ball moved toward the other balls that were sitting, all touching each other, in the middle of the pool table. What happened when the cue ball hit one of the other balls?
A. All of the balls lost energy.
B. The cue ball and the ball it hit lost energy.
C. All of the balls except the cue ball lost energy.
D. Only the cue ball lost energy.

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

Select the correct answer. which of the following statements is a scientific claim? a. the early solar system had large amounts of water; so, the oldest objects in the solar system should also be abundant in water. b. the mass of the universe is much greater than current models predict; it is not possible to explain this inconsistency. c. planet earth is abundant in water, but there is no way to scientifically determine from where earth's water originated. d. earth is shaped like a sphere even if not all of the scientific observations related to its shape support this idea.