| Solid |
Matter in a state where particles are closely packed and vibrate but do not move freely. |
Definite shape and volume. |
Ice, iron, wood. |
| Liquid |
Matter in a state where particles are close together but can move past each other. |
Definite volume but no definite shape; takes shape of the container. |
Water, oil, mercury. |
| Gas |
Matter in a state where particles are far apart and move freely. |
No definite shape or volume; expands to fill the container. |
Oxygen, carbon dioxide, nitrogen. |
| Plasma |
Ionized gas with high energy particles. |
High energy, conducts electricity, and can be affected by magnetic fields. |
Sun, stars, lightning. |