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Chapter 3
States of Matter - Solid, Liquid, Gas, and Plasma
Term | Definition |
---|---|
States of Matter | The physical forms in which a substance can exist. |
Solid | The state of matter that has a definite shape and volume. |
Crystalline Solid | Solid with a very orderly, three-dimensional arrangement of particles in a repeating patten of rows (ie Iron, Diamond, Ice). |
Amorphous Solid | Solids made of particles that do not have a special arrangement in patterns (ie Glass, Rubber, and Wax). |
Liquid | The state of matter that has a definite volume but not a definite shape. |
Surface Tension | The force that acts on the surface of a liquid and that tends to minimize the area of the surface (the reason a paperclip sits atop water). |
Viscosity | The resistance of a gas or liquid to flow. |
Gas | A form of matter that does not have a definite volume or shape. |
Temperature | A measure of how hot (or cold)something is; specifically, a measure of the movement of particles. |
Volume | The amount of space that an object takes up. |
Pressure | The amount of force exerted on a given area of surface. |
Boyle's Law | The law that states that the volume of a gas is inversely proportional to the pressure of a gas when temperature is constant (ie as volume decreases, pressure increases and as volume increases, pressure decreases). |
Charle's Law | The law that states that the volume of a gas is directly proportional to the temperature of a gas when pressure is constant (ie: as temperature decreases, volume decreases and as temperature increases, volume increases). |
Change of state | The change of a substance from one physical state to another (ie: ice to water, water to vapor). |
Melting | The change of state from a solid to a liquid (ice turning into water). |
Freezing | The change of state from a liquid to a solid (ie: water turning into ice). |
Evaporation | The change of a substance from a liquid to a gas (ie: water turning into steam). |
Boiling | The conversion of liquid to a vapor when the vapor pressure of the liquid equals the atmospheric pressure. |
Condensation | The change of state from a gas to a liquid (ie steam turning to water on your bathroom mirror after a shower). |
Sublimation | When a solid changes directly into a gas (no melting, goes straight from solid to gas without turning into a liquid in between). |
Plasma | “Superheated Gas” - A mixture of charged particles. When gas is heated to high temperatures the particles of the atoms are free to collide. |