Answer the following question given this paragraph: The sun and other stars consist of plasma. Plasma is also found naturally in lightning and the northern and southern lights. Human-made plasma is found in fluorescent lights, plasma TV screens, and plasma spheres. Q: What material comprises the sun and other stars, as well as lightning and the northern lights? Choices: - aurora - gamma - gas - plasma A:
plasma
Answer the following question given this paragraph: can occur in electrolytic cells by introducing a power supply, which supplies the energy to force the electrons to flow in the nonspontaneous direction. Electrolysis is done in solutions, which contain enough ions so current can flow. If the solution contains only one material, like the electrolysis of molten sodium chloride, it is a simple matter to determine what is oxidized and what is reduced. In more complicated systems, like the electrolysis of aqueous sodium chloride, more than one species can be oxidized or reduced and the standard reduction potentials are used to determine the most likely oxidation (the half-reaction with the largest [most positive] standard reduction potential) and reduction (the half-reaction with the smallest [least positive] standard reduction potential). Sometimes unexpected half-reactions occur because of overpotential. Overpotential is the difference between the theoretical half-reaction reduction potential and the actual voltage required. When present, the applied potential must be increased, making it possible for a different reaction to occur in the electrolytic cell. The total charge, Q, that passes through an electrolytic cell can be expressed as the current (I) multiplied by time (Q = It) or as the moles of electrons (n) multiplied by Faraday's constant (Q = nF). These relationships can be used to determine things like the amount of material used or generated during electrolysis, how long the reaction must proceed, or what value of the current is required. 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: Answer the following question given this paragraph: You can tell that this sponge is saturated with water because when it is squeezed, the water pours out. When something is saturated with water, it already holds as much water as possible. Compounds called hydrocarbons, which contain only carbon and hydrogen, can also be saturated, but not with water. Q: What compounds contain only carbon and hydrogen? Choices: - carbonates - particles - molecules - hydrocarbons A:
A: hydrocarbons
Question: Answer the following question given this paragraph: Air reaches its dew point when humidity increases or temperature decreases. 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*
Answer the following question given this paragraph: Between 1971 and 1982, the Soviets put a total of seven Salyut space stations into orbit. Figure below shows the last of these, Salyut 7. These were all temporary stations. They were launched and later inhabited by a human crew. Three of the Salyut stations were used for secret military purposes. The others were used to study the problems of living in space. Cosmonauts aboard the stations performed a variety of experiments in astronomy, biology, and Earth science. Salyut 6 and Salyut 7 each had two docking ports. One crew could dock a spacecraft to one end. A replacement crew could dock to the other end. 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: Answer the following question given this paragraph: Sodium is a highly reactive metal, and chlorine is a poisonous gas (see Figure below ). The compound they synthesize has very different properties. It is table salt, which is neither reactive nor poisonous. In fact, salt is a necessary component of the human diet. Q: Sodium and chlorine combine to make what? Choices: - gold - seawater - iron - salt A:
A: salt