Question

An indicator of a chemical change. Two liquids combine and form a solid.

Answer 1

Tell students that sometimes when two liquids are mixed, a solid forms. This solid is a new substance, and it's called a precipitate.

sometimes when two liquids are mixed, a solid forms. This solid is a new substance, and it's called a precipitate. Explain that when substances are mixed and a new substance is formed, a chemical reaction has occurred.