Earth Layers
What are all the layers of the earth?
Crust, Mantle, Outer Core, and the inner core
What is the definition of plate tectonics?
the lithosphere of the earth is divided into the small number of plates which float on and travel independently over the mantle and much of the earth seismic activity occurs at the boundaries of these plates.
What is convection currents?
The heat transfer due to bulk movements of molecules within fluids such as gases and liquid including molten rock.
Describe plate boundaries?
plate boundaries are underwater and form submarine mountain ranges called oceanic spreading fidges
How many layers make up the earth?
4 Layers
what are three types of plate movements?
divergent, convergent, transform
Where does convection take place through?
advection, diffusion or both
what is plate boundaries definition?
a tectonic boundary where two plates are moving away from each other and form a new crust.
What is underneath the earth?
The Mantle
Explain convergent boundaries?
where the crust is destroyed as one plate dives under another.
Why do we need convection currents?
This includes liquids and gases and is because the molecules have to be free to move.
what do divergent plate boundaries form?
in the middle of the ocean contribute to seafloor spreading.
Where does lava come from?
The molten rock may come from the mantle.
explain divergent boundaries?
where two plates are moving apart
What is an example of convention?
Boiling Water
what landforms are created at transform boundaries?
where plates slide past each other forming stong earthquakes
How is lava created?
It is created deep beneath earth surface, where temperatures get hot enough to melt rocks.
Explain transform boundaries?
Where plates slide passed each other
Does convection always work more quickly than conduction?
No
why are plates moving?
they are floating on earth mantle, a really thick layer of hot flowing rock.