Which statement best describes a physical change?

• A. It forms a new substance.
• B. It always releases energy.
• C. It may involve changes in state or shape without forming new substances.
• D. It changes the composition of matter.

Answer: (C)

Physical change is when a material changes form or state but remains the same substance. It may involve changing from solid to liquid or altering shape, size, or appearance, yet no new substance is created. For example, ice melting into water, paper being torn, or metal being bent are all changes in form or state without creating something new. The statement that fits best reflects this idea by noting changes in state or shape that do not produce new materials.

Energy changes aren’t the defining factor here—some physical changes require energy (like melting) and some don’t, and releasing energy isn’t required for a change to be physical. Also, changing the composition would mean a chemical change, where new substances with different properties form.