Q: What material comprises the sun and other stars, as well as lightning and the northern lights? Choices: - aurora - gamma - gas - plasma A:
plasma

Q: The difference between the theoretical half-reaction reduction potential and the actual voltage required is called what? Choices: - resistance - excess - overcharge - overpotential A:
overpotential

Q: Q: What compounds contain only carbon and hydrogen? Choices: - carbonates - particles - molecules - hydrocarbons A:
A: hydrocarbons

Question: Q: Air is said to reach what point, a term used by meteorologists, when humidity increases or temperature decreases? Choices: - bubble point - its dip point - freezing point - its dew point A:
Answer: its dew point

*Question*
Q: What country put seven salyut space stations into orbit between 1971 and 1982? Choices: - United States - China - Japan - soviet union A:
**Answer**
soviet union

Q: Q: Sodium and chlorine combine to make what? Choices: - gold - seawater - iron - salt A:
A: salt