Earthsblayers Structure And Physical Shape

Question 1

Oceanic lithosphere

Answer 1

Uppermost layer of earth, oceanic forms ocean and thinner rock
Temp-900
Compsoition-basalt

Question 2

Continental lithosphere

Answer 2

Uppermost layer of earth, continetal forms land and is thicker rock
Composition-granite
Temp-900

Question 3

Asthenosphere

Answer 3

Denser layer of mantle where convection currents move plates
It can flow slowly
Temp-900-1000

Question 4

Lower mantle

Answer 4

Thickest part of earth where conevection currents occur and is solid
Temp-1600-4000

Question 5

Outer core

Answer 5

Thick fluid layer that sits lower mantle and inner core
Compsoition-iron icketemo-4500-5500

Question 6

Inner core

Answer 6

Centre of earth and highest density levels and radioactive and is solid
Compsoition-iron and nickel
Temp-4000-5000

Question 7

Conevection currents

Answer 7

Lower mantle where fluid gets heated at high temp,rises in upper mantle as become less dense and go outside in ciruclar motion where they cool and become more dense and drag asthenospjere which moves tectonic plates. cycle repeated.