Structure of earth (layers of earth)

Question 1

how many layers does the earth have? And what are those

Answer 1

3 - the core, the mantle, the crust

Question 2

What are the outer most layers of earth?

Answer 2

The crust

Question 3

____ is the lease dense layer of earth with thickness about 5-70 km

Answer 3

The crust

Question 3

The crust is composed of solid ____ and ____ .

Answer 3

solid rock and minerals

Question 4

______ is thickest at the tallest mountain ranges, and thinnest at the deepest ocean trenches.

Answer 4

the crust

Question 5

How many part that the crust divide into and what are those?

Answer 5

(2)
1. the continental crust
2. the oceanic crust

Question 5

the continental crust is composed mainly with of ____.

Answer 5

granite

Question 6

the continental crust is sometimes called ___?

Answer 6

SIAL

Question 7

why do the continental crust got called SIAL?

Answer 7

because its rock are rich in silicate and aluminum minerals.

Question 8

the ___ crust is below the ocean.

Answer 8

the oceanic crust.

Question 9

the oceanic crust is sometimes called?

Answer 9

SIMA

Question 10

The oceanic crust is composed mainly of ____

Answer 10

basalt

Question 11

why the oceanic crust got called SIMA?

Answer 11

because its rocks are rich in silicate and magnesium minerals.

Question 12

the ____ is the layer below the crust.

Answer 12

the mantle

Question 12

the mantle is _,___ km thick.

Answer 12

2900 km thick

Question 13

The mantle is composed mainly of ____? (3)

Answer 13

silicon, magnesium and iron.

Question 14

how many layers that the mantle have? and what are those?

Answer 14

(2)
1. the upper mantle
2. the lower mantle

Question 15

the upper mantle is about ____ km thick

Answer 15

400 km thick.

Question 16

the bottom part of the upper mantle form what?

Answer 16

asthenosphere

Question 16

the upper mantle is divide into how many part and what are those?

Answer 16

(2)
1.top part of the upper mantle
2.the bottom part of the upper mantle

Question 17

asthenosphere is composed of what?

Answer 17

semisolid or molten rock
called magma

Question 18

why do magma in the asthenosphere flows?

Answer 18

it flows because it is under high pressure.

Question 19

the lower mantle is about ______ km thick

Answer 19

2,500 km thick

Question 20

the temperature of the lower mantle range is between

Answer 20

2,500-4,000 due to the high temperature and high pressure

Question 21

magma in the lower mantle is?

Answer 21

denser than magma in the upper mantle.

Question 22

____ is the innermost layer of earth.

Answer 22

the core

Question 23

The core is about ______ km thick

Answer 23

3470 km thick

Question 24

the core is composed manly of what?
___ and _____

Answer 24

iron and nickel

Question 25

what are the state of the core?

Answer 25

both in molten and solid state.

Question 26

the core is divide into how many layer and what are those?

Answer 26

(2)
1. the outer core
2. the inner core

Question 27

The outer core is about ____ km thick

Answer 27

2,200 km thick.

Question 28

the outer core is composed of what?

Answer 28

composed with molten iron and nickel due to its high temperature.

Question 29

what does the scientist believe about the outer core?

Answer 29

it is the earth’s magnetic field

Question 30

the ____ core is the center of the earth

Answer 30

inner corer

Question 31

The inner core is about ____ Celsius.

Answer 31

6,000 Celsius

Question 31

what are the inner core is composed with?

Answer 31

solid iron and nickel

Question 32

the bottom part of the upper mantle form what?

Answer 32

Lithosphere