Question

multiple - choice question
true or false: all chemical changes are accompanied by a physical change.

Explanation:

In a chemical change, substances react to form new substances. During this process, there are often observable physical changes such as changes in state (solid - liquid - gas), color, or temperature. For example, when iron rusts (a chemical change), there is a color change from shiny metal to a reddish - brown rust.

Answer:

True