Question

What is the main difference between the two layers of the mantle?

Answer 1

The inner mantle is solid and super hot while the outer mantle is liquid and not as hot

Answer 2

UPPER MANTLE

- Lithosphere (Sial and Sima)

- Asthenosphere (Molten Rock River)

- Mesosphere

LOWER MANTLE

OUTER CORE (Liquid Iron and Nickel)

INNER CORE (Solid Iron Compounds)

When you learn the layers of the Earth there really isn't a lot to explain. It's one of those memorization things. You might be wondering how all the layers came to be. When the Earth was forming billions of years ago, the matter came together. The densest matter moved to the center of the planet. The lighter rocks remained on the surface. When everything was done, the mantle wound up being about 2/3 the mass of the planet.