Answer:
1. crust
The crust is the outermost layer of the planet, the cooled and hardened part of the Earth that ranges in depth from approximately 5-70 km
2. mantle
The mantle, which makes up about 84% of Earth's volume, is predominantly solid, but behaves as a very viscous fluid.
3. outer core
Liquid outer core
Composed of molten nickel and iron
outer core spins, creating the Earth's magnetic field that protects from solar wind
4. inner core
solid inner core
Composed of nickel and iron, solid due to extreme pressure
