| A | B |
|---|
| homogeneous mixture | Every sample of this matter is the same |
| heterogeneous mixture | Two samples of this matter might contain different kinds of matter |
| element | A pure subtance that contains one kind of matter |
| compound | Contains two or more kinds of matter that cannot be separated by physical means |
| substance | A sample of matter that cannot be separated by physical means; may contain only one or several |
| mixture | A sample of matter that contains two or more kinds of particles that can be separated by physical means |
| density | A measurement of the "compactness" of a substance; the ratio of its mass to volume |
| elasticity | A measure of a solid's ability to return to its original shape after it is stretched or squeezed |
| malleability | A measurement of how well a solid resists breaking when it is pulled on |
| viscosity | A measure of a fluid's resistance to flow |
| physical property | Can be observed directly or measured iwth a tool |
| chemical property | Capacity of a substance to undergo a change that alters the composition of the substance |
| kinetic theory | States that all matter is composed of molecules, atoms and ions |
| acid | pH is less than 7 |
| base | pH is more than 7 |
| pH scale | Measures the concentration of hydrogen ions in a solution |
| solid | Has a definite shape; particles closely packed |
| liquid | Particles can slip past one another; takes the shape of the container |
| gas | Particles move radomly in a straight line |
| temperature | A measure of kinetic energy of the particles |
