Phases of Matter State: Solid Phases of Matter State: Solid Volume: Fixed State: Solid Volume: Fixed Shape: Fixed State: Solid Volume: Fixed Shape: Fixed State: Solid Volume: Fixed Shape: Fixed State: Solid Density: A solid is about 10% more dense than a liquid. State: Solid Density: A solid is about 10% more dense than a liquid. An exception is solid water (ice), which is less dense than liquid water. State: Liquid Volume: State: Liquid Volume: Fixed State: Liquid Volume: Fixed Shape: State: Liquid Volume: Fixed Shape: Same as its container, or else it forms a wide, shallow puddle. State: Liquid Density: Packed together, but about 10% less dense than a solid (except water). State: Liquid Particle illustration: State: Liquid Particle motion: Move freely around each other. State: Liquid A key physical property of a liquid is viscosity. It means “the resistance of a liquid to flowing.” State: Liquid High viscosity means it doesn’t flow easily. Examples of liquids with high viscosity: (list at least 3) State: Liquid High viscosity means it doesn’t flow easily. Examples of liquids with high viscosity: Syrup, oil, ketchup, molasses State: Liquid Examples of liquids with low viscosity: (list at least 3) State: Gas Volume: State: Gas Volume: It varies depending on the size of the container. State: Gas Volume: It varies depending on the size of the container. Shape: State: Gas Volume: It varies depending on the size of the container. Shape: Indefinite. It takes the shape of its container. State: Gas Particle position: Far apart, with lots of empty space. Gas is about 1000 times less dense than liquid. State: Gas Particle motion: Move quickly and freely in all directions, like a flock of seagulls. State: Gas Particle illustration: Summary Particle illustration of 3 phases of CO2 Summary Particle illustration of 3 phases of H2O Postscript A fourth phase of matter is plasma, a partially ionized gas, in which a certain proportion of electrons are free rather than being bound to an atom or molecule. Stars are mostly in the plasma phase.