The higher density worlds are the outer planets. (True or false)
Our Solar System's eight planets differ significantly in size, mass, and density (i.e. its mass per unit of volume). For example, the four inner planets — those closest to the Sun – are all terrestrial planets, which means they are made mostly of silicate minerals or metals and have a solid surface. The density of these planets varies slightly as one travels from the surface to the centre, but not significantly.
The four outer planets, on the other hand, are classified as gas giants (or ice giants) because they are predominantly made up of hydrogen, helium, and water in various physical forms. Despite their larger size and mass, these planets have a substantially lower total density. Furthermore, the density of the materials changes significantly between the outer and inner layers, ranging from a liquid condition to materials that are so dense that they become rock-solid.
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