| A | B |
|---|
| solid | state or phase of matter with a defined shape |
| liquid | state or phase of matter that assumes the shape of it's container |
| gas | state or phase of matter that takes the shape of it's container AND it can be compressed |
| plasma | state or phase of matter which has so much energy that is found mostly in stars |
| heat energy | you can make molecules change phases by adding or substracting this |
| dry ice | frozen carbon dioxide |
| glass, wax, rubber | examples of amorphous solids |
| salt, sand, gemstone | examples of crystalline solids |
| amorphous solids | solids without a regular repeating pattern |
| crystalline solids | solids with a regular repeating pattern |
| molecules move fastest in this phase | plasma |
| molecules move faster than liquids in this state | gas |
| molecules move the slowest in this state | solid |
| molecules move around each other in this state | liquid |
| molecules can escape their container in this state | gas or plasma |
| this state of matter is the most common in the universe | plasma |
| if you add heat to this state of matter it melts | solid |
| if you take energy away from this state of matter it condenses into liquid | gas |
| if you add energy to this state of matter it boils | liquid |
| If you increase the pressure on a gas, the volume will decrease. | Boyle's Law |
| If you increase the temperature of a gas, the volume will increase also. | Charles' Law |
| Increasing the temperature of a substance causes the molecules to move___________. | faster |
| This change happens when a substance either absorbs enough energy or gives off enough energy | Phase change |
| This is responsible for the different phases of matter. | Heat energy |
| The temperature at which a solid changes to a liquid. | Melting point |
| 100 degrees Celsuis for Water | boiling / condensation point |
| the temperature at which a liquid becomes a solid | freezing point |
| freezing point for water in celsius | 0 degrees C |
| melting/ freezing point for water in fahrenheit | 32 degrees F |
| These help to identify an unknown substance for scienctists. | freezing and boiling points |
| the change of a substance from a liquid to a gas is called --- | vaporization |
| vaporization taking place at the surface of a liquid | evaporation |
| perspiration evporates and __________ your body temperature | lowers |
| evporation ___________ heat energy | absorbs or uses up |
| if vaporization happens inside or at the bottom of a liquid, this is called --- | boiling |
| at high altitudes, air pressure is much lower and the boiling point is --- | reduced or lowered |
| water vapor in the air changes to liquid drops on a cold glass | condensation |
| when a solid does this, its surface particles escape directly into the gas phase | sublimation |
