Question

13 multiple choice 1 point what does it mean when there is a physical change? matter has changed from one substance into another. matter has changed on the molecular level. a new substance has been formed. matter has changed size, shape or form. 14 multiple choice 1 point what is an example of a chemical change that happens inside your body? food being broken down by enzymes in your stomach food being broken into small pieces by your teeth food being moved from your esophagus into your stomach water being absorbed inside your large intestine 15 multiple choice 1 point what is an example of a physical change that happens inside your body? food being broken down by enzymes in your stomach food being broken into small pieces by your teeth food being moved from your esophagus into your stomach water being absorbed inside your large intestine

Explanation:

1. A physical change is a change in the size, shape, or form of matter without changing its chemical composition. Changing from one substance to another, changing on the molecular - level, or forming a new substance are characteristics of chemical changes.
2. Food being broken down by enzymes in the stomach is a chemical change as enzymes catalyze chemical reactions to break down food into simpler substances. Food being broken into small pieces by teeth is a physical change (mechanical), food moving from esophagus to stomach is a physical movement, and water absorption in the large intestine is a physical process of osmosis.
3. Food being broken into small pieces by teeth is a physical change as it only changes the size and shape of the food. Food being broken down by enzymes is a chemical change, food movement from esophagus to stomach is a physical movement, and water absorption is a physical process related to osmosis.

Answer:

1. Matter has changed size, shape or form.
2. Food being broken down by enzymes in your stomach
3. Food being broken into small pieces by your teeth