Explanation:

- During filtering, the coffee grounds (solid) are separated from the coffee liquid (liquid) using a filter paper. No new substances are formed, and the chemical composition of both the coffee grounds and the coffee liquid remains the same.

- Physical changes involve changes in the form or appearance of a substance without altering its chemical composition. Examples of physical changes include changing the state of matter (e.g., melting ice), dissolving a solid in a liquid, or filtering a mixture.

- Chemical changes, on the other hand, involve the transformation of one substance into one or more new substances with different chemical compositions. Examples of chemical changes include burning wood, rusting iron, or digesting food.