Answer the following question given this paragraph: Convection is the transfer of thermal energy by particles moving through a fluid. Particles transfer energy by moving from warmer to cooler areas. That's how energy is transferred in the soup in Figure above . Particles of soup near the bottom of the pot get hot first. They have more energy so they spread out and become less dense. With lower density, these particles rise to the top of the pot (see Figure below ). By the time they reach the top of the pot they have cooled off. They have less energy to move apart, so they become denser. With greater density, the particles sink to the bottom of the pot, and the cycle repeats. This loop of moving particles is called a convection current . Q: Convection is the transfer of thermal energy by particles moving through what? Choices: - Solid - tissue - Metal - fluid A:
fluid
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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:
soviet union
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Answer the following question given this paragraph: Bond lengths are intermediate between covalent single bonds and covalent double bonds. Q: Bond lengths are intermediate between covalent single bonds and what? Choices: - trivalent bonds - wavefunction double bonds - gravitational double bonds - covalent double bonds A:
covalent double bonds
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Answer the following question given this paragraph: Kidney failure may be treated with dialysis. Q: Dialysis is a treatment for failure of what organs? Choices: - lungs - liver - spleen - kidneys A:
kidneys
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