Answer the following question given this paragraph: Animal behavior is any way that animals interact with each other or their environment. Many animal behaviors promote fitness by increasing the chances of surviving or reproducing. If such behaviors are controlled by genes, they evolve by natural selection. Q: What term is used to describe the way that animals interact with each other or their environment? Choices: - animal magnetism - animal decline - animal range - animal behavior A:
animal behavior
Answer the following question given this paragraph: The rate of the expansion of the universe is increasing. The cause of this increase is unknown; one possible explanation involves a new form of energy called dark energy. Q: What is happening to the rate of the expansion of the universe? Choices: - it is decreasing - it is stable - it is unknown - it is increasing A:
it is increasing
Q: Answer the following question given this paragraph: All substances are made of atoms. Atoms are the smallest particles of matter. They cannot be divided into smaller particles, created, or destroyed. Q: What are considered to be the smallest particles of matter? Choices: - cells - ions - molecules - atoms A:
A: atoms
Question: Answer the following question given this paragraph: Centripetal force is, simply, the force that causes centripetal acceleration. Objects that move in uniform circular motion all have an acceleration toward the center of the circle and therefore, they must also suffer a force toward the center of the circle. That force is the centripetal force. For orbiting satellites, such as the moon orbiting the earth or the earth orbiting the sun, the centripetal force is produced by gravity. When an Olympic hammer thrower whirls a massive ball on a chain, the centripetal force is created by the athlete and transmitted by the chain. Q: What produces the centripetal force to keep the earth orbiting the sun? Choices: - heat - motion - weight - gravity A:
Answer: gravity
*Question*
Answer the following question given this paragraph: Water has remarkable properties. Water expands when it freezes, even though all other substances contract. This means that in the winter ice on a pond or lake will float. Water has high surface tension because polar molecules tend to stick together. That's why drops stick together or some bugs can walk on the surface of a pond. Without water, life might not be able to exist on Earth. If it did exist, it would not be as diverse or as complex. Q: What can water's high surface tension be attributed t? Choices: - territorial molecules sticking together - molecules create a thin film-like substance - electric impulses in atoms - polar molecules sticking together A:
**Answer**
polar molecules sticking together
(Q).
Answer the following question given this paragraph: Digestion consists of mechanical and chemical digestion. Q: There are two types of digestion, mechanical and what else? Choices: - radiation - mineral - thermal - chemical A:
(A).
chemical