| A | B |
|---|
| matter | anything that has mass and takes up space |
| no 2 objects can | occupy the same space |
| mass | amount of matter in an object |
| weight | measure of the force of gravity pulling on an object |
| volume | amount of space that something occupies |
| phase of matter | solid |
| phase of matter | liquid |
| phase of matter | gas |
| solid matter | tightly packed particles |
| adding heat energy | makes particles move faster and farther apart |
| melting point | temperature at which a solid becomes a liquid |
| liquid matter | can be poured |
| solid matter | has definite size and shape |
| liquid matter | takes shape and volume of container |
| freezing point | temperature at which a liquid becomes a solid |
| water freezes | 0 degrees C. |
| boiling point | temperature at which a liquid becomes a gas |
| evaporation | prcess in which a liquid becomes a gas |
| gas matter | particles move very fast and are farthest apart |
| gas | oxygen |
| condensation | process in which gas changes into liquid |
| physical characteristics | shape, size, texture, mass, volume, density |
| physical change | does not alter chemical makeup of a substance |
| physical change | tear paper |
| chemical change | alters a substance so it forms a new substance |
| chemical change | burning candle |
| density | how much matter is packed into a given volume of space |
| density = | m/v |
| atoms | smallest unit of matter |
| molecules | made up of 2 or more atomes joined together |
| elements | matter made of all the same kind of atoms |
| compounds | made up of more that 1 kind of element |
| examples of compounds | water, sugar |
| mixture | keep their properties |
| examples of mixtures | candy mix, things in pencil box |
| solution | particles dissolve in solvent |
| examples of solutions | kool-aid, lemonade, iced tea |
| suspensions | particles settle out, need shaken |
| examples of suspensions | salad dressing, liquid medicine |
| colloids | permanently suspended |
| examples of colloids | jelly, jello, ooze |
| water freezes at | 0 degrees C |
| water freezes at | 32 degrees F |
| water boils at | 100 degrees C |
| water boils at | 212 degrees F |
