Question

1. what type of change in matter happens when your body breaks down the food in your stomach to form substances it can use? a) physical change b) chemical change c) energy chang d) reversible change

Explanation:

To determine the type of change, we analyze each option:

• Option a (physical change): Physical changes don’t form new substances (e.g., melting ice). Digestion forms new substances (like nutrients), so this is incorrect.
• Option b (chemical change): Chemical changes involve forming new substances. When food is digested, complex molecules (e.g., starch) break down into simpler, usable substances (e.g., glucose), creating new matter. This matches.
• Option c (energy change): “Energy chang” (likely a typo for “energy change”) describes energy transfer, not the type of matter change. Digestion involves chemical reactions (new substances) and energy changes, but the question asks about matter change, so this is incorrect.
• Option d (reversible change): Reversible changes can be undone (e.g., freezing water). Digestion is irreversible (food can’t re-form into its original state), so this is incorrect.

Answer:

b) chemical change