Free 1st Grade Solids, liquids and gases Worksheets

First graders learn that matter exists in three states and that each state behaves differently: solids have a fixed shape, liquids flow and take the shape of their container, and gases spread out to fill their container. They identify familiar examples of each state and explore simple examples of state changes, like ice melting to water.

The three states of matter are typically introduced in Grade 1 during a physical science or matter unit. Teachers often use water in its three forms, ice, liquid water, and steam (carefully), as a central example.

Cook or bake together and point out examples of all three states: the solid butter, the liquid oil, the steam rising from a pot. Ask your child to classify what they see and explain their reasoning. Watching ice melt in a glass at the table is also a simple, engaging demonstration of a state change.