(Question)
Q: What do you call the heat below earth's surface that can be used to produce electricity? Read this paragraph and choose the correct option from the provided answers: Heat below Earth's surfacecalled geothermal energy can be used to produce electricity. A power plant pumps water underground where it is heated. Then it pumps the water back to the plant and uses its thermal energy to generate electricity. On a small scale, geothermal energy can be used to heat homes. Installing a geothermal system can be very costly, however, because of the need to drill through underground rocks. Choices: - inert energy - renewable energy - natural energy - geothermal energy A:
(Answer)
geothermal energy

(Question)
Q: A machine is any device that makes work easier by doing what? Read this paragraph and choose the correct option from the provided answers: A machine is any device that makes work easier by changing a force. When you use a machine, you apply force to the machine. This force is called the input force. The machine, in turn, applies force to an object. This force is called the output force. Recall that work equals force multiplied by distance:. Choices: - moving things - changing molecules - removing barriers - changing a force A:
(Answer)
changing a force

(Question)
Q: What are the only invertebrates that can fly? Read this paragraph and choose the correct option from the provided answers: The main reason that insects have been so successful is their ability to fly. Insects are the only invertebrates that can fly and the first animals to evolve flight. Flight has important advantages. It's a guaranteed means of escape from nonflying predators. It also aids in the search for food and mates. Choices: - birds - amphibians - mammels - insects A:
(Answer)
insects