PS1.A: Introduction to Solids, Liquids, and Gases

I can sort objects by observing properties such as size, shape, color, weight, and texture.
I can identify objects and materials as solid, liquid, or gas. I know that solids have a definite shape and that liquids and gases take the shape of their container.


Solid: Solid objects have fixed shape and fixed volume. Solids hold their shape and size. For example, table, it occupies space and has fixed shape.

Liquid: Liquid is a substance that flows freely (no fixed shape), but fixed volume. Liquids do not hold their shape and take the shape of the container they are poured in. For example, water, it takes the shape of the container.

Gas: Gas is a substance that has neither a fixed shape nor a fixed volume. Gases take the shape of the container and fill up the space. For example, air in the baloon, it does not have fixed shape nor fixed volume.