In gases the particles move rapidly in all directions ... A model may be an equation, a diagram or an analogy that helps explain a scientific idea. are used in science to help explain scientific ...

In the diagram above the rope moves up and down but the energy is transferred along the rope from left to right, at 90° to the oscillation. The particles move up and down as the wave moves from ...

We need to consider how we can link the macroscale observable properties of solids, liquids and gases with what is happening at a particulate level. The particle model of matter helps to explain ...