| A | B |
|---|
| states of matter | thw physical forms in which a substance can exsist |
| solid | state of matter that has definite shape and volume; particles are very close together and constantly vibrating |
| crystalline solid | particles of a solid that are arranged in a repeating pattern of rows |
| amorphous solids | particles of a solid that do not have a special arrangement of atoms |
| liquid | a state of matter which has a definite volume, but not a definite shape; particles slide past one another |
| surface tension | the force that acts on the surface of a liquid and tends to minimize the area of the surface |
| viscosity | the resistance of a gas or liquid to flow |
| gas | a form of matter that does not have a definite volume or shape; particles break away copletely from one another |
| temperature | a measure of how hot or cold something is; the measure of the movement of the particles |
| volume | the measure of the size of abody or region in three dimensional space |
| pressure | the amount of force exerted per unit area of surface |
| Boyle's Law | volume of a gas is inversely porportional to the pressure when the temperature is constant |
| Charles's Law | volume is directly porportional to the temperature when the pressure is constant |
| change of state | the change from one physical state of matter to another |
| melting | changeof state in which a solid becomes liquid by adding energy |
| melting point | the temperature at which a substance changes from a solid to a liquid |
| endothermic | when energy is gained by the substance that is changing state |
| freezing | changing of state from a liquid to a solid |
| exothermic | energy is removed from the substance as it changes state |
| freezing point | the temperature at which a liquid changes to a solid |
| evaporation | the change of a substance from a liquid to a gas |
| boiling | the conversion of a liquid to a vapor throughout the liquid; vapor pressure is equal to atmospheric pressure |
| vapor pressure | pressure inside the bubbles of boiling water |
| boiling point | the temperature at which a liquid boils |
| condensation | the change of state that involves gases turning to liquid |
| sublimation | the process in which a solid changes directly to a gas |
