Plate Tectonics
He came up with the theory of the continental drift and Pangaea
Who is Alfred Wegner?
It is the process in which rocks change shape due to pressure.
What is deformation?
Any place where gas, ashy or melted rock comes of the ground.
What is a volcano?
The ground movement that occurs when a block of rock suddenly moves and releases energy.
What is an earthquake?
It is when magma under the Earth's surface rises through cracks in ridges cools and forms an oceanic crust.
What is sea-floor spreading?
It occurs when rock layers bend under stress.
What is folding?
The resistance of liquid material to flow
What is viscosity?
It is directly above the focus on the Earth's surface.
What is an epicenter?
It describes large-scale movements of Earth's lithosphere.
What is plate tectonics?
Fault blocks move horizontally past each other.
What is a strike-slip fault?
It has a broad base and erupts gently
What is a shield volcano?
Stress that stretches or pulls rocks apart.
What is tension?
They form when 2 plates collide.
What are convergent boundaries?
One plate(the hanging wall) goes under another plate(the footwall)
What is a normal fault?
The ash and pieces of cinder harden and soon build up to form this type of volcano.
What is a cinder cones volcano?
Stress that squeezes or pushes rocks together.
What is compression?
It is when two plates move away from each other.
What are divergent boundaries?
When both plates push upward(the hanging wall and the footwall?)
What is a reverse fault?
This volcano has alternating layers of lava flow and pyroclastic material which creates composite layers.
What is a composite volcano?
Stress that pushes rocks in a parallel but opposite direction.
What is shear stress?