## What layer of the Earth is least dense Why?

The crust is the surface on which we are living. The crust is 0 – 32 KM (0-19.8 miles). In relation to the other layers the crust is the thinnest and the least dense layer. It floats on the softer, denser mantle.

## What layers of Earth is most dense to least dense?

The layers of the solid Earth from least dense to most dense are: lithosphere, asthenosphere, mantle, outer core, inner core.

## Which layer has the least amount of density?

The layer of the atmosphere that has the lowest density is the exosphere.

## What are the densities of Earth’s layers?

Structure of the Earth
Thickness (km) Density (g/cm3)
Crust 30 2.2
Upper mantle 720 3.4
Lower mantle 2,171 4.4
Outer core 2,259 9.9

## Why is the earth dense?

Earth is the most dense planet, but it isn’t made from the most dense material – that would be Mercury. The earth is denser because the material is compacted more because the gravity is larger. If the two planets were the same size, then Mercury would be denser.