Alaska Science Grade 8 Practice Questions - Alaska Science Assessment, Grade 8 Exam

Which observation is the BEST evidence that a chemical reaction has occurred?

Salt dissolves completely in water. A new solid forms when two clear liquids are mixed and the temperature rises. Ice melts into liquid water in a warm room. A metal rod is bent into a new shape.

Correct Answer:

A new solid forms when two clear liquids are mixed and the temperature rises.

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