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 and go outside in ciruclar motion where they cool and drag asthenospjere which moves tectonic plates. cycle repeated.