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Science · Grades 7–8

Entropy

noun

A measure of disorder or randomness in a system; the tendency of systems to move toward disorder.

Example Sentences

"Ice melting into water increases entropy because liquid is more disordered than solid."

"The second law of thermodynamics states that entropy of a closed system always increases."

Synonyms & Related Terms

disorderrandomness

Quick Check

Which best describes the meaning of entropy?

Study Tips

To remember entropy, 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.