A change of a substance from one form to another without changing its chemical properties is called a

• A. Chemical Change
• B. Physical Change
• C. Mass Change
• D. State Change

Answer: (B)

Think about changes that alter how a substance looks or exists without changing what it is made of. A physical change is when the material’s chemical identity stays the same, even though its form or state might change. Changing a substance from solid to liquid or liquid to gas—its state—falls under this idea, and that kind of change can usually be reversed by physical means. That’s why the correct term is physical change: it covers changes in form or state without forming new substances. In contrast, a chemical change would create new substances with different properties, and a mass change would imply gaining or losing material, which isn’t the defining idea here.