Question 6 of 10 How is a scientific theory developed?

A. One scientist supports his or her hypothesis with an experiment.

B. A single experiment is carefully performed once.

C. Many different experiments are repeated many times.

D. An experiment is repeated over and over with the same results.

Hydroelectricity provides about 7 percent of the electricity generated in the united states. (a) explain how a hydroelectric power plant converts energy stored in water into electricity. (b) identify two factors that determine the amount of electricity that can be generated by an individual hydroelectricity power plant. (c) describe the two main types of land-based hydroelectric power plants. (d) describe two economic advantages and two environmental disadvantages of hydroelectricity.