Final answer:
Burning toast is the correct answer as it represents a chemical change where new substances are formed unlike the other options which represent physical changes.
Step-by-step explanation:
The question seeks to identify which scenario indicates a chemical change that happens during cooking.
- Boiling water is a physical change, as the water transitions from a liquid to a gas without altering its chemical composition.
- Melting butter is also a physical change, as the butter changes from solid to liquid but its chemical structure remains the same.
- Burning toast is a chemical change because the toast converts to new substances like carbon and other compounds due to the high temperature causing a chemical reaction.
- Dissolving salt in water is a physical change, as the salt disperses in the water but does not change its chemical identity.
The correct answer to the question is c) Burning toast, as this is the option that represents a chemical change occurring during the cooking process.