Question

Based on density in what order would the following layer (least dense to most dense)?

outer core
crust
mantle
atmosphere
inner core

Answer 1

The Earth's layers, ordered from least dense to most dense, are the atmosphere, crust, mantle, outer core, and inner core, respectively.

Step-by-step explanation:

To order the Earth's layers from least dense to most dense, one must consider each layer's composition and density. The atmosphere is the least dense, being composed of gases. The crust is denser, particularly the continental crust, which is less dense than the oceanic crust.

Next in terms of density is the mantle, which consists of ultramafic rocks that have more iron and magnesium and are denser than crustal materials. After the mantle comes the outer core, which is composed of liquid iron and nickel with higher density than the mantle. Finally, the most dense layer is the inner core, made of solid iron and nickel with the highest density due to the intense pressure it is under.

Therefore, the correct order of the Earth's layers from least dense to most dense is:

1. Atmosphere
2. Crust
3. Mantle
4. Outer Core
5. Inner Core