| A | B |
|---|
| investigation | A procedure carried out to gather data about an object or event---0 |
| experiment | A procedure carried out under controlled conditions to test a hypothesis---0 |
| scientific method | A series of steps that scientists use when performing an experiment |
| matter | Anything that has matter and takes up space---1 |
| mass | The amount of matter in an object---1 |
| volume | The amount of space an object takes up---1 |
| density | The measure of how closely packed matter is in an object---1 |
| solid | The state of matter that has a definite shape and a definite volume---1 |
| liquid | The state of matter that has a definite volume but no definite shape---1 |
| gas | The state of matter that does not have a definite shape or volume---1 |
| mixture | A blending of two types of matter that are not chemically combined----1 |
| solution | A uniform mixture of two or more substances in a single state of matter---1 |
| volume | A measurement of how soft or loud a sound is---2 |
| atom | The smallest unit of an element that has all the properties of that element---2 |
| element | A substance made up of only one kind of atom---2 |
| change of state | A physical change that occurs when matter changes from one state to another, such as from a liquid to a gas---2 |
| chemical change | A reaction or change in a substance, produced by chemical means, that results in a different substance---2 |
| compound | A substance made of two or more different elements---2 |
