Earth structure

Question 1

what is the percentage of earth’s volume for crust, mantle?

Answer 1

crust: 1%
mantle: 80%

Question 2

what is the crust made out of and its thickness?

Answer 2

• basalt and granite rocks
  -70km

Question 3

Mantle: thickness temperature

Answer 3

Mostly solid rock, 2.9000km thick, temp of up to 800°c to 3000°c

Question 4

what is the core made out of and wht is
its depth n length N tempt

Answer 4

Iron and nickel, liquid outer and solid inner, 3.500km with temps from 3000° to 5000°

Question 5

Why do plates move?

Answer 5

Convection currents, movement of heat in mantle, causing plates to be dragged the hot mantle material cools n sinks dragging plates along. Repeats. Slab pull force.

Question 6

O-O plate divergence landforms

Answer 6

Mid Atlantic Ridge, volcanoes + seafloor spreading

Question 7

Example of o-o divergence

Answer 7

North American plate and Eurasion plate

Question 8

C-C divergence landforms

Answer 8

Block Mountains and rift Valley

Question 9

CC plate divergence how is it formed

Answer 9

When the plate diverges or moves apart, it is stretched and causes fractures

Question 10

what is O-O plate convergence

Answer 10

The denser plate subducts under the less dense plate, known as subduction zone. A depression is created which forms oceanic trench

Question 11

Landform of O-O convergence

Answer 11

Volcanoes, oceanic trench,

Question 12

Example of O-O convergence

Answer 12

Pacific plate and Philippines plate

Question 13

what is C-C plate convergence

Answer 13

2 CC plates collide as they RESIST subduction as the plates r too buoyant

Question 14

Example of CC convergence

Answer 14

Indian and eurasian plate, creating himalayas

Question 15

Landform of CC convergence

Answer 15

Fold mountains, volcanoes

Question 16

OC plate convergence landforms

Answer 16

Volcanoes, oceanic trench, fold mountains

Question 17

Example of OC plate convergence

Answer 17

Australian plate and eurasian plate creating sunda trench n barisan mountains

Question 18

Fold mountains formation

Answer 18

Convergent plate boundaries, compressional force causes layers of Dock to buckle and fold

Question 19

Reasons for the movement of plate tech

Answer 19

Convection current cause the movement of material in the mantle as the core heats it up causing the material to expand, rise and spread out beneath the plates. This results in plates being dragged along to move away from each other. Hot mantle sinks as it cools. It heats up agn, cycle repeats.

Question 20

Slap pull force

Answer 20

SPF occurs when dense sinking oceanic plate at subduction zones pulls the rest of the plate behind it.