| A | B |
|---|
| Matter | anything that has mass and takes up space |
| Characteristic properties | qualities of a substance that never change and can be used to identify the substance |
| boiling point | temperature liquid is actively going from liquid to gas when heated |
| melting point | temperature a solid becomes a liquid |
| physical changes | changes the form of a substance, but not what it is. |
| chemical changes | when substances combine or break apart to form new substances |
| chemical activity | a characteristic property of a substance that indicates its ability to undergo a specific chemical change |
| mixture | consists of two or more substances that are in teh same place but not chemically combined |
| pure substance | made of only one kind of matter and has definite properties |
| elements | cannot be broken down into other substances all atoms are the same |
| compound | substance made of two or more elements that are chemically combined |
| atom | smallest part of an element that all the traits are the same |
| molecule | smallest part of a compound that has all the traits of the compound |
| solution | evenly mixed mixture |
| solid | matter with a definite shape and volume |
| liquid | matter that has a definite volume, but takes the shape of the container, but can't always fill up the container |
| gas | matter with no definite shape or volume, spreads out to take the shape of the container no matter how large |
| # natural elements | approximately 100 on periodic table |
| condensation point | temperature matter goes from gas to liquid |
| evaporation point | temperature matter goes from liquid to gas |
| freezing point | temperature matter goes from liquid to solid |
| sublimation | solid goes directly from solid to gas |
| chemical bond | force that hold atoms of matter together |
| density | amount of matter in a given volume |
| temperature | measure of the amount of kinetic energy in matter |
| thermal energy | heat energy in matter |
| state or phase of matter | form it is in (solid, liquid, gas) |
