Interior Of Earth

Question 1

Layers of Earth

Answer 1

Crust: 0-34 km
Mantle: 34-2900 km
Core: 2900-6371 km

Question 2

Compsition by volume

Answer 2

Crust < 1%
Mantle 84%
Core 14%

Question 3

Continental crust made up of ____

Answer 3

SiAl

Question 4

Oceanic crust made up of ____

Answer 4

SiMa

Question 5

Mantle made up of ___

Answer 5

SiMa

Question 6

Core made up of ____

Answer 6

NiFe

Question 7

Rate of change of temp with depth

Answer 7

1 deg C / 32 m

Question 8

Rocks melt down to form lava around ____

Answer 8

100-200 km

Question 9

Mantle is divided in

Answer 9

Upper Mantle: 32-700 km

Lower Mantle: 700-2900 km

Question 10

Core divided in

Answer 10

Outer core: 2900-5150 km

Inner core: 5150-6400 km

Question 11

Lithosphere made from ___

Answer 11

Solid Part

Crust +
Some upper mantle (upto 100 km)

Question 12

Asthenosphere made from ____

Answer 12

Some upper mantle (100-700 km)

Question 13

Composition of Crust

Answer 13

OSiAl FeMg

Oxygen: 46%
Silicon: 28%
Aluminium: 8%
Iron: 5%
Magnesium: 4%

Question 14

Composition of Earth

Answer 14

FeOSi MgNi

Iron: 35%
Oxygen: 30%
Silicon: 15%
Magnesium: 13%
Nickel: 2.5%