Question

which process is a sign of a chemical change? a cloud quickly changes shape when blown by wind a rotting potato gives off a bad smell a melting block of ice leaves a large puddle a plaster statue breaks when it falls onto the floor

Explanation:

A chemical change results in the formation of new substances. A rotting potato undergoes a chemical reaction with oxygen and microorganisms, producing new substances that cause the bad - smell. Changing the shape of a cloud, melting ice, and breaking a plaster statue are physical changes as no new substances are formed.

Answer:

A rotting potato gives off a bad smell