Structure Of The Earth

Question 1

How many layers does the earth have

Answer 1

4

Question 2

Crust

Answer 2

Solid layer of rock on the surface of the planet. Thickness varies from 3-30miles, 1% of the earths volume

Question 3

Mantle

Answer 3

Semi liquid layer of magma/molten rock. Move due to convection currents

Question 4

Outer core

Answer 4

Liquid part of the core has a similar composition to the inner core

Question 5

Inner core

Answer 5

Solid part, centre of the earth, made up of iron and nickel, temperatures reaching 5500 degrees

Question 6

Spreading/constructive ⬅️➡️

Answer 6

Ocean plates move away creating a gap between them eg mid Atlantic ridge, this causes volcanic activity eg Iceland

Question 7

➡️↘️⬅️ destructive/sink

Answer 7

Ocean plate sinks below another on at a subduction zone eg ocean trench, this causes earthquakes, volcanoes and tsunamis eg mount merapi Indonesia

Question 8

➡️⬅️collision zones/ crash

Answer 8

2 continental plates move together eg Mount Everest, cause earthquakes eg Himalayas

Question 9

Conservative/slip ⬆️⬇️

Answer 9

2 plates slide past each other eg faults causes earthquakes eg San Andreas fault California