LAYERS OF THE EARTH

1.       Atmosphere: it is the gaseous layer surrounding the Earth planet. It is made of several gases, mainly Nitrogen and oxygen.

2.       Hydrosphere: It is the huge mass of water that covers three quarters (3/4) of the planet surface. The Hydrosphere is essential for maintaining living things cycles and nutrient cycles in the planet.

3.       Crust: it is a layer extending from the surface to 33 km deep. It is divided in 2 parts: the Upper zone (forming the continents) and the Lower zone.

4.       Mantle: it is an intermediate layer situated between the lithosphere and the core.

5.       Core: this part of the Earth is unknown because nobody have reached that deep inside. It has a high temperature coming from the remaining heat on planet formation and decaying radioactive elements.