This is a 4th-5th grade Science passage with comprehension questions. It is about the three states of matter (Solid, Liquid, Gas). It could be used as classwork, group work, a quiz or assessment. Physical Sciences: PS1-2-1 Plan and conduct an investigation to describe and classify different kinds of materials by their observable properties. PS1A: Structure and properties of matter. ● Different kinds of matter exist (e.g., wood, metal, water), and many of them can be either solid or liquid, depe