Plate tectonics theory Flashcards
The inner core contains lots of…
iron and nickle
The outer core is semi molten and also contains lots of…
iron and nickle
The mantle is made from…
magma and silicate rocks
The part of the mantle nearest the core is quite…
rigid
The section of the mantle that is semi molten and can flow is called the…
asthenosphere
The very top section of the mantle is…
rigid
The outer layer of the earth is called the…
crust
The rigid top part of the mantle and the crust is called the…
lithosphere
Continental crust is…
thicker 30-70kmn thick and less dense
Oceanic crust is….
thinner 6-10km thick and more dense
The lithosphere is divided into sections called…
tectonic plates
The places where plates meet are called…
plate boundaries
Tectonic plates move due to…
convection currents in the mantle
The earths core is extreamley hot over ____ *c
4000
