Question: what are the observable properties of the three different states of matter?
Answer: Solids have both a fixed volume and a fixed shape. [01:55], Solids are rigid. [02:09], Liquids have both a fixed volume but a changeable shape. [03:07], Liquids are fluids. [03:44], Gases have both a changeable volume and a changeable shape. [04:31], Gases are also fluids. [04:48], CHANGE OF STATE. [07:25]