Which statement best describes a physical change?

Which statement best describes a physical change?

• A. A physical change alters the form or appearance without changing its chemical composition.
• B. A physical change alters the chemical composition.
• C. A physical change creates new substances with different properties.
• D. A physical change always involves color change.

Answer: (A)

Physical changes involve a change in form or appearance without changing the substance’s chemical identity. That means the material may look different or be in a different state, but what it’s made of stays the same. This is why melting ice into water is a physical change—the water is still H2O, just a liquid instead of a solid. Cutting paper, bending metal, or dissolving sugar in water are also physical changes because the substances themselves aren’t transformed into new chemicals. The other ideas describe chemical changes: altering chemical composition, creating new substances with different properties, or implying a color change as a must-have feature. In reality, a physical change can happen with or without a color change, so color change isn’t a reliable indicator on its own.

Physical changes involve a change in form or appearance without changing the substance’s chemical identity. That means the material may look different or be in a different state, but what it’s made of stays the same. This is why melting ice into water is a physical change—the water is still H2O, just a liquid instead of a solid. Cutting paper, bending metal, or dissolving sugar in water are also physical changes because the substances themselves aren’t transformed into new chemicals.

The other ideas describe chemical changes: altering chemical composition, creating new substances with different properties, or implying a color change as a must-have feature. In reality, a physical change can happen with or without a color change, so color change isn’t a reliable indicator on its own.