Question

which of these is a physical change?

rust is formed on a nail in water

an object is cut into pieces

Explanation:

Define physical change

A physical change alters the form or appearance of a substance without changing its chemical composition.

Analyze the options

• "rust is formed on a nail in water": This is a chemical reaction (oxidation) that creates a new substance (iron oxide), which is a chemical change.
• "an object is cut into pieces": This only changes the size and shape of the object, not its chemical identity, which is a physical change.

Answer:

• rust is formed on a nail in water
• an object is cut into pieces (Correct answer)