| A | B |
|---|
| substance | a pure sample of matter |
| element | a substance which can't be decomposed by chemical means |
| compound | a substance made of 2 or more elements chemically combined in a definate ratio |
| mixture | two or more substances in a variable ratio |
| solution | a homogeneous mixture |
| homogeneous | a mixture that has the same composition throughout, mixed at the molecular level |
| heterogenous | a mixture that is not uniform throughout, different types of substances can be seen |
| energy | capacity to do work |
| potential energy | stored energy |
| kinetic energy | energy of motion |
| calorie | a unit of heat energy, 1 calorie raises the temperature of 1 gram of water 1 degree Celsius |
| kilo | 1000 x |
| milli | 1/1 000 x |
| micro | 1/1 000 000 x |
| centi | 1/ 100 x |
| deci | 1/10 x |
| mega | 1 000 000 x |
| cubic centimeter (cc) | same as a milliliter (mL) |
| temperature | measure of kinetic energy |
| exothermic | energy is released |
| Kelvin temperature | Celsius + 273 |
| 0 degrees Celsius | freezing point of water |
| 100 degrees Celsius | boiling point of water at 1 atmosphere |
| melting | phase change from solid to liquid |
| boiling | phase change from liquid to gas |
| condensation | phase change from gas to liquid |
| freezing/crystallization | phase change from liquid to solid |
| sublimation | phase change from solid to gas |
| CO2, I2 | they sublime |
| 0 Kelvin | absolute zero |
| -273 degrees Celsius | absolute zero |
