One situation indicates a physical change rather than a chemical change. Which situation indicates a physical change?

ASolid copper melts to form liquid copper.
BA firecracker explodes on the fourth of July.
CWater reacts with the iron on your bicycle to form rust.
DMagnesium metal is mixed with hydrochloric acid and hydrogen gas is formed. Eliminate

Verified Answer :

The physical change would be A. Solid copper melting to form liquid copper. The rest are all examples of chemical change.

Answer:

Solid copper melts to form liquid copper,

Explanation:

In a chemical change, something new is being formed. When copper melts, or any phase change occurs, nothing new is formed chemically, so this would be a physical change.