Physical Geography

Question 1

Earth’s radius

Answer 1

Approx 6371km

Question 2

Three divisions of earth interior

Answer 2

Crust, Mantle and Core

Question 3

Crust thickness

Answer 3

Till 34 km

Question 4

Mantle depth

Answer 4

From 34 to 2900 km

Question 5

Core depth

Answer 5

From 2900km to 6371 km or 6400 km

Question 6

Composition of Crust

Answer 6

SIAL - silicon and Aluminium

Question 7

Composition of Mantle

Answer 7

SIMA

Question 8

Composition of core

Answer 8

NIFE

Question 9

Which crust is more thick oceanic or continental

Answer 9

Continental

Question 10

Oceanic crust is made up of ?

Answer 10

SIMA

Question 11

What is the reason behind high temp inside earth as per Arthur Holmes

Answer 11

Radioactive Elements

Question 12

For every ____ m 1° C temp increases inside the earth

Answer 12

32

Question 13

After 100km Rock melts true or false

Answer 13

True

Question 14

What consists of Lithosphere

Answer 14

Crust + upper part of upper mantle

Up till 100-200 km

Question 15

Lithosphere consists of SIMA AND SIAL ? T OR F

Answer 15

True

Question 16

Asthenosphere is in which state

Answer 16

Semi solid

Question 17

Asthenosphere is the source of ?

Answer 17

Magma

Question 18

Asthenosphere depth range

Answer 18

100km to 700 km

Question 19

Asthenosphere is part of crust/mantle / core

Answer 19

Upper mantle

Question 20

What is the state of lower Mantle

Answer 20

Solid State due to pressure

Question 21

State of outer core

Answer 21

Liquid

Question 22

State of inner core

Answer 22

Solid

Question 23

Why outer core is liquid

Answer 23

Because iron has a low melting point as compared to silicates

Question 24

Barysphere

Answer 24

Outer and inner core

Question 25

Mesosphere

Answer 25

Lower Mantle

Question 26

Discontinuity b/w Upper crust and Lower Crust

Answer 26

Conrad

Question 27

Discontinuity between Crust and Mantle

Answer 27

Moho

Question 28

Discontinuity between upper Mantle lower Mantle

Answer 28

Repetite

Question 29

Discontinuity between Mantle and core

Answer 29

Guttenberg

Question 30

Discontinuity between Outer and inner core

Answer 30

Lehman