| A | B |
|---|
| atom | smallest particle into which an element can be divided |
| element | a pure substance that cannot be broken down into simpler substances |
| compound | a pure substance composed of 2 or more elements |
| states of matter | the physical forms in which a substance can exist |
| solid | the state in which matter has a definite shape and volume |
| liquid | the state in which matter takes the shape of its container & has a definite volume |
| gas | the state in which matter changes in both shape and volume |
| plasma | the state of matter that does not have a definite shape or volume and whose particles have broken apart |
| volume | the amount of space that something occupies |
| mixture | a combination of 2 or more substances that are not chemically combined |
| physical property | a property of matter that can be observed or measured without changing the identity of the matter |
| density | the amount of matter in a given space |
| boiling point | the temperature at which a liquid boils and becomes a gas |
| melting point | the temperature at which a substance changes from a solid to a liquid |
| solubility | the ability to dissolve in another substance |
| acid | any compound that increases the number of hydrogen ions when dissolved in water & tastes sour |
| chemical property | a property of matter that describes a substance based on its ability to change into a new substance with different properties |
| base | any compound that increases the number of hydroxide ions when dissolved in water & tastes bitter |
| chemical change | a change that occurs when one or more substances are changed into entirely new substances with different properties |
| combustibility | the ability to burn |
| reactivity | the ability to react with other substances |
