Which one of the following statements is False?
1) Each type of rock or mineral has its own density, allowing scientists to identify what rocks are inside the Earth.
2) Since the speed and deflection of a wave is determined by the density of the rock it moves through, measuring the seismic waves can tell us the density of different areas inside the Earth.
3) S waves do not travel through solids, providing evidence that the outer core is solid.
4) Seismic waves are waves of energy caused by earthquakes.