Which term best describes a change in matter that produces one or more new substances?

• A. Physical change
• B. Phase change
• C. Chemical change
• D. Mixture formation

Answer: (C)

Verified step by step guidance

1. Understand the definitions of the terms given: A physical change involves changes in physical properties without forming new substances, such as shape or state changes.
2. Recognize that a phase change is a specific type of physical change where matter changes from one state (solid, liquid, gas) to another without altering its chemical identity.
3. Identify that mixture formation involves combining substances physically without chemical bonding or creating new substances.
4. Know that a chemical change results in the formation of one or more new substances with different chemical properties and compositions.
5. Conclude that since the problem asks for a change producing new substances, the best term to describe this is a chemical change.