Question

How are chemical changes different from physical changes? (1 point)
They include shifts in the phase of
• matter.
• They are reversible.
• They form new substances.
• They involve heat.

Answer 1

Chemical changes and physical changes differ primarily in that **chemical changes form new substances**. In a chemical change, the composition of the substance changes, resulting in the creation of one or more new substances with different properties. In contrast, physical changes do not alter the chemical composition and typically involve changes in state, shape, or appearance but not in the identity of the substance.