INTERIOR EARTH (GEOGRAPHY ) FOR OSSC CGL EXAMINATION 2022

                                  INTERIOR EARTH 

Mechanically Earth's Layer Can Be Divided Into Two Parts. 

a) Lithosphere - 

It Is The Outer Part Of The Earth. 

Spread Over (10--200 Km In Earth) 

Consists Of - The Crust & Upper Part Of Mantle 

* Lithosphere Is Broken Into Tectonic Plates (Lithospheric Plates) & The Movement Of These Tectonic Plates Cause The Large Scale Changes In The Earth's Geological Structure (Folding & Faulting) 

b) Asthenosphere -  (Astheno Means - Weak) 

- It Is The Upper Portion Of The Mantle 

- Lies Between 80-200 km 

5 Discontinuities Inside The Earth - 

(a) Conard Discontinuity - Transition Zone Between SIAL & SIMA 

(b) Mohorovic Discontinuity - Transition Zone Between The Crust & Mantle 

(c) Repitti Discontinuity - Transition Zone Between Outer Mantle & Inner Mantle 

(d) Gutenberg Discontinuity - Transition Zone Between Mantle & Core 

(e) Lehmann Discontinuity - Transition Between Outer Core & Inner Core 

THE CRUST - 

* The Temperature Of Crust Increases With Depth. 

* Outer Covering Of Crust Is Sedimentary Material. 

* Lower Layer Of Crust Consists Of Basaltic & Ultra Basic Rocks. 

* The Crust Consists Of Silicon + Aluminium (SIAL) 

ELEMENTS FOUNDS ON EARTH CRUST - 

Oxygen - 47% 

Silicon - 28% 

Aluminium - 8% 

Iron - 5% 

Magnesium - 4% 

Calcium - 2% 

Potassium - 2% 

Sodium - 2% 

Others - 2% 

THE MANTLE - 

Depth Upto 2900 Km . 

* Composed Of Silicon + Magnesium (SIMA) 

THE OUTER CORE - 

- Depth 2900- 5100 KM 

- Outer Core Composed Of Iron + Nickel (NIFE) 

THE INNER CORE - 

- 5100 KM 

- Composed Of Iron (80%) + Nickel (NIFE) 

LAYERS OF ATMOSPHERE - 

(1) TROPOSPHERE - (0 -18 KM) 

* Climate And Weather Changes Occur. 

* Temperature Decrease At Rate Of 1 Degree For Every 165 m Height. 

* The Zone Separates Troposphere And Stratosphere Is Called Tropopause. 

(2) STRATOSPHERE -  (19-50 km) 

* Found Ozone Layer (Which Absorbs Ultraviolet Radiation) 

* The Zone Separates Stratosphere And Mesosphere Is Called Stratopause. 

(3) MESOSPHERE - (51-80KM) 

* The Upper Limit Is Called Mesopause. 

(4) IONOSPHERE OR THERMOSPHERE - (81-400 KM) 

* It Consists Of Electrically Charged Particles Known As Ions. 

* Radio wave Transmitted 

* Temperature Increases With Height 

(5) EXOSPHERE - 

* Outermost Layer Of Atmosphere