Question

which of these example is a physical change?

Explanation:

A physical change is a change in which the form or appearance changes, but no new substances are formed. Burning wood (first option) is a chemical change as new substances like ash and gases are formed. Mixing baking soda and vinegar (second option) is a chemical reaction producing carbon - dioxide gas. A banana turning brown (fourth option) is a chemical change due to oxidation. Breaking a pencil only changes its physical form without creating new substances.

Answer:

Broken Pencil