Answer the following question given this paragraph: A mountain-building event is called an orogeny . Orogenies take place over tens or hundreds of millions of years. Continents smash into each other. Microcontinents and island arcs smash into continents. All of these events cause mountains to rise. Q: What is the term for a mountain-building event? Choices: - glaciation - volcanism - erosion - orogeny A:
orogeny
Answer the following question given this paragraph: dome-shaped plug of thick lava that cools near the vent of a volcano. Q: Why do hummingbirds have long narrow bills? Choices: - to feed their offspring - to store food - for protection against predators - to reach the nectar at the bottom of flowers A:
to reach the nectar at the bottom of flowers
Q: Answer the following question given this paragraph: Food waste enters the large intestine from the small intestine in a liquid state. As the waste moves through the large intestine, excess water is absorbed from it. The remaining solid waste is called feces. After a certain amount of feces have collected, a sphincter relaxes to let the feces pass out of the body through the anus. This is elimination. Q: What substance is removed from waste as it passes through the large intestine? Choices: - blood - nutrients - air - water A:
A: water
Question: Answer the following question given this paragraph: After doing the research, the farmer will try to answer the question. She might think, "If I don't plow my fields, I will lose less soil than if I do plow the fields. Plowing disrupts the soil and breaks up roots that help hold soil in place. " This answer to her question is a hypothesis . A hypothesis is a reasonable explanation. A hypothesis can be tested. It may be the right answer, it may be a wrong answer, but it must be testable. Once she has a hypothesis, the next step is to do experiments to test the hypothesis. A hypothesis can be proved or disproved by testing. If a hypothesis is repeatedly tested and shown to be true, then scientists call it a theory . Q: What is another name for a reasonable explanation for something that might be formed near the beginning of a scientific inquiry into a problem? Choices: - experiment - conclusion - theory - hypothesis A:
Answer: hypothesis
*Question*
Answer the following question given this paragraph: Chemical reactions always involve energy. Energy is a property of matter that is defined as the ability to do work. When methane burns, for example, it releases energy in the form of heat and light. Other chemical reactions absorb energy rather than release it. Q: Chemical reactions always involve what? Choices: - fuel - heating - physical change - energy A:
**Answer**
energy
*Question*
Answer the following question given this paragraph: Atoms or groups of atoms that carry an overall electrical charge are referred to as ions. Cations can be formed when a neutral species loses electrons, while anions are formed when a neutral species gains electrons. Q: What are atoms or groups of atoms called which carry and electrical charge? Choices: - protons - molecules - electrons - ions A:
**Answer**
ions