Final answer:
Uranium is used as a fuel in nuclear power plants to produce electricity through the process of nuclear fission.
Step-by-step explanation:
Uranium is used as a fuel in nuclear power plants to produce electricity through a process called nuclear fission. The atoms of uranium-235, a fissionable isotope of uranium, undergo a chain reaction, releasing heat and high-energy radiation which is used to generate steam. The steam then drives a turbine to produce electricity.