| A | B |
|---|
| atom | the building block of matter |
| compound | a substance formed when atoms of two or more elements join together |
| element | matter that has only one kind of atom |
| gas | a form of matter that has no definite shape or volume |
| liquid | a form of matter that has a definite volume but no definite shape |
| model | a picture, an idea, or an object that is built to explain how something else looks or works |
| molecule | the smallest particle of a substance that has the same properties as the substance |
| nucleus | the central part of an atom |
| properties | characteristics that help identify an object |
| solid | a fom of matter that has a definite shape and volume |
| state of matter | the form that matter has - solid, liquid, or gas |
| symbol | one or two letters that represent the name of an element |
