| A | B |
|---|
| matter | anything that has mass and takes up space |
| volume | the amount of space matter takes up |
| mass | the amount of matter an object is made of |
| chemical change | a change in matter that produces one or more new substances |
| atom | the smallest particle of an element that still has the properties of that element |
| mixture | two or more substances that are not chemically combined |
| physical change | changes in matter that do not change the composition of the matter |
| element | a pure substance that cannot be broken down into simpler substances |
| substance | a single kind of matter that is pure - always the same composition and the same properties |
| electron | the particle in the atom with a negative charge |
| chemical property | characteristic of a pure substance that describes its ability to change into different substances |
| neutron | the particle within the atom with no charge at all |
| density | the amount of matter in a given space |
| weight | the measure of the force of gravity on an object's mass |
| proton | the particle within the atom that has a positive charge |
| physical property | characteristic of a pure substance that can be observed without changing it into another substance |
| gas | state of matter in which the particles spread apart and fill all the space available to them |
| liquid | state of matter in which the particles remain in close contact but can still move past each other |
| solid | state of matter in which the particles are packed tightly together in fixed positions |
| compound | pure substance made of two or more elements chemically combined in a set ratio |
