| A | B |
|---|
| temperature | the measurement of the average kinetic energy of the molecules in a substance or object. |
| kinetic molecular theory | All matter is made of particles that are in constant motion and have space in between them. |
| atom | the smallest unit of an element that contains all the properties of that element. |
| elements | The basic building blocks of matter and found on the Periodic Table. |
| electron | The part of an atom with a negative charge. |
| proton | The part of an atom with a positive charge. |
| neutron | The part of an atom with charge of zero or neutral. |
| solid | The state of matter in which the volume and the shape of a substance are fixed. The molecules are packed closely together in fixed positions. |
| gas | A form of matter that does not have a definite volume or shape. The molecules are far apart and move freely. |
| liquid | The state of matter that has a definite volume, but not a definite shape. The molecules are farther apart and can move past each other. |
| pressure | The amount of force exerted on the surface of an object. |
| kinetic energy | Energy in motion |
| state of matter | the physical forms in which a substance can exist; states include solid, liquid, and gas. |
