plate tectonics
What happens when the Oceanic crust and Continental crust come together?
The dense ocean floor crust pushes down into the mantle re-melting the crust. Which causes volcanic mountains and deep trenches.
What is radiation?
The transfer of energy through space without touching of the objects.
How old is the earth?
300 million years old
What are mid ocean ridges?
The longest chains of underwater mountains.
What happens when oceanic crust vs oceanic crust come together
Deep trenches; island arc of volcanos by older denser crust is being pushed down under the younger. Which is also called subduction.
What is conduction?
Conduction is the heat transfer within materials that are touching.
What did Alfred Weagners idea become known as?
continental drift
What did scients use to map the mid ocean ridges?
Sonar
What happens when its contintal vs continental?
There is no plate subduction,and it causes the crust to crumble up and form mountains.
What is convection?
The way heat can be transferred by the movement of liquid fluids or gasses.
When did pangea begin to break apart?
Over tens of millions of years ago.
What claim did Harry Hess not make
That the earth was getting bigger.
How do hot spots work?
When theres weak spots around the crust magma will just flow into the surface.
Is sunlight radiation convection or conduction?
Radiation
What continents line up?
Africa and south America
What goes on in the sea floor spreading process?
Its when new material continually gets added to the sea floor.
How many convergent boundries are there.
three
When the mantle near the core heats up does it become less dense?
Yes
Why was is hypothesis rejected?
He did not provide an acceptable explanation for the force that pushes and pulls the continents.
Where does sea floor spreading begin?
It begins a the mid ocean ridges.