Answer the following question given this paragraph: Most people think of opossums as scary creatures. Is this because they look kind of funny, walk kind of funny, have beady eyes and sharp teeth, and can emit a very foul odor? Maybe. But what is so different about opossums is that they are the only marsupial in North America. Q: What is the only marsupial in north america? Choices: - Raccoon - Didelphinae - Marmosa - oppossum A:
oppossum
Answer the following question given this paragraph: Uranus is so far away that there has been relatively little exploration of the planet. The closest approach was a flyby by Voyager 2 in 1986. Great images have also been taken by the Hubble Space Telescope. Q: What is the name of the spacecraft that has performed the closest flyby of uranus? Choices: - Mercury 7 - centaur 2 - Zodiac 4 - voyager 2 A:
voyager 2
Q: Answer the following question given this paragraph: Carbon-14 has a relatively short half-life. It decays quickly compared to some other unstable isotopes. So carbon-14 dating is useful for specimens younger than 50,000 years old. That's a blink of an eye in geologic time. But radiocarbon dating is very useful for more recent events. One important use of radiocarbon is early human sites. Carbon-14 dating is also limited to the remains of once-living things. To date rocks, scientists use other radioactive isotopes. Q: What property of carbon and other elements can be used to date fossils and rocks, among other things? Choices: - mass - full-life - magnetic force - half-life A:
A: half-life
Question: Answer the following question given this paragraph: In the reaction above, the zinc is being oxidized by losing electrons. However, there must be another substance present that gains those electrons and in this case that is the sulfur. In other words, the sulfur is causing the zinc to be oxidized. Sulfur is called the oxidizing agent. The zinc causes the sulfur to gain electrons and become reduced and so the zinc is called the reducing agent. The oxidizing agent is a substance that causes oxidation by accepting electrons. The reducing agent is a substance that causes reduction by losing electrons. The simplest way to think of this is that the oxidizing agent is the substance that is reduced, while the reducing agent is the substance that is oxidized. The sample problem below shows how to analyze a redox reaction. Q: What substance causes oxidation by accepting electrons? Choices: - solvents - enzymes - thermal agent - oxidizing agent A:
Answer: oxidizing agent
*Question*
Answer the following question given this paragraph: Pyrite has a similar color to gold. The appearance of the striations make pyrite different from gold. Q: What color is pyrite? Choices: - blue - black - silver - gold A:
**Answer**
gold
Answer the following question given this paragraph: This drawing shows that the skin has many layers. The outer layer is so tough that it keeps out most pathogens. Q: The outer layer of what anatomical structure is so tough that it keeps out most pathogens? Choices: - liver - steel - bark - skin A:
skin