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Science · Grades 5–6

Evolution

noun

The gradual change in species over many generations through natural selection.

Example Sentences

"Darwin's theory of evolution explains how modern species developed."

"Evolution occurs when organisms with beneficial traits survive and reproduce."

Synonyms & Related Terms

natural selectionadaptation

Quick Check

Which best describes the meaning of evolution?

Study Tips

To remember evolution, 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.