Question

A physical change is when the chemical composition (such as H20) does not change, only the form. Which of the following are a physical changes? [Click ALL that apply!]

A. Burning food

B. Chopping wood

C. Breaking glass

D. Burning water

Answer 1

A physical change is one where the substance's chemical composition remains the same, and only its physical form or state is altered. Among the options provided, the physical changes are:

B. Chopping wood
C. Breaking glass

A. Burning food and D. Burning water both involve chemical changes, as they result in new substances being formed.