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Question

The four outer planets are made of …

dense solid rocky and metallic materials

less dense gasses but with larger is size and mass

dense gasses and rock interiors

less dense lava and noxious gasses

Answer 1

The four outer planets of our solar system—Jupiter, Saturn, Uranus, and Neptune—are primarily made of less dense gases but with larger size and mass. These planets, often referred to as gas giants (with Uranus and Neptune sometimes classified as ice giants), have thick atmospheres composed mainly of hydrogen and helium, with varying amounts of other gases and, in the case of Uranus and Neptune, ices like water, ammonia, and methane. Their massive sizes and lower densities distinguish them from the terrestrial planets, which are primarily rocky.