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Science · Grades 7–8

Nuclear Fission

noun

The splitting of a heavy atomic nucleus into smaller nuclei, releasing large amounts of energy.

Example Sentences

"Nuclear fission is the process used in nuclear power plants."

"The first atomic bomb used nuclear fission of uranium."

Synonyms & Related Terms

atomic splitting

Quick Check

Which best describes the meaning of nuclear fission?

Study Tips

To remember nuclear fission, try writing it in a sentence of your own. Connect it to something you already know about science.

Use it in conversation today — saying a word aloud three times helps lock it into long-term memory.