States of Matter
In a solid the particles are very close together and have a fixed position, they vibrate around the fixed position but are not free to move. The particles in a solid have very low energy.
In a liquid the particles are close together but they have a random arrangement, they move around each-other and have greater energy. Liquids take the shape of the container they're in.
Gas particles are far apart from each-other and are free to move in any direction. They have a random arrangement and have the highest energy.