* Crust: The Earth's crust is solid, but it's made up of different types of rock. The oceanic crust is thinner and denser than the continental crust.

* Inner Core: The Earth's inner core is solid, but it's solid in a very unusual way. It's incredibly hot (around 5,200°C / 9,392°F) and under immense pressure. The pressure is so great that the iron and nickel in the core are forced into a solid state even though they are above their melting point. This state is sometimes called "solid-like" because it can behave like a fluid over very long periods.

Let me know if you have any other questions about the Earth's structure!