Question

Explain the layers of the interior of the earth with reference to the following :

(a) Depth,
(b) Temperature
(c) Density.

Answer 1

Crust :

(a) Depth 35-50 km below continents and 6-12 km. below the oceans.
(b) Temperature — Less than 870°C
(c) Density — 2.7 g/Cm³ – 5.5 g/Cm³.

Mantle :

(a) Depth — 50 – 2900 km.
(b) Temperature — 1500° C – 2200°C
(c) Density — 3 g/Cm³ – 4.5 g/Cm³

Core :

(a) Depth — 2900 km – 3500 km
(b) Temperature — 2200°C – 5000°C
(c) Density — 10.0 g/Cm³ – 13.6 g/Cm³.