In this module, first graders will have introductory experiences with two of these states of matter, solids and liquids. Solids are one state of matter. Solid materials have properties that separate them from other states of matter. Materials can be sorted based on their properties. Particles of solid materials can pour like liquids but also maintain their shape.
Solid materials can support denser materials on their surfaces.
Solid particles can be separated with a screen. Liquids are one state of matter. Liquids can have many properties, including transparent or translucent, viscous or free flowing, foamy or clear. All liquids pour and flow. Liquids can take the shape of their container.