GED Science Practice

What does hydroelectric refer to?

1. a) A nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form helium

2. b) An organism that is the offspring of genetically dissimilar parents or stock

3. c) Of or relating to or used in the production of electricity by waterpower

4. d) Technique of growing plants (without soil) in water containing dissolved nutrients

The correct answer is: c) Of or relating to or used in the production of electricity by waterpower

Hydroelectric refers specifically to the generation of electricity through the use of water power. This process typically involves harnessing the kinetic energy of flowing or falling water to spin turbines connected to generators, thereby converting mechanical energy into electrical energy. This method of energy production is renewable and is a major component of the global electricity supply, particularly in areas with abundant water resources. The other options do not pertain to the production of electricity using water. For instance, the first option discusses a nuclear process involving hydrogen and atomic energy, which is unrelated to hydroelectric power. The second option is about hybrid organisms resulting from the breeding of genetically dissimilar parents, a concept from biology. The fourth option describes a hydroponic growing technique which does not focus on energy production but rather on soil-less cultivation of plants. Each of these concepts exists in distinct contexts separate from hydroelectric power generation.