It states that the Earth's outermost layer is fragmented into a dozen or more large and small plates that are moving relative to one another as they ride atop hotter, more mobile material.
What is the theory of plate tectonics?
100
It is a surface rock, quickly cooled with small crystals.
What is extrusive rock?
100
Flat, round-shaped volcanoes with no more than a 10-degree slope.
What is a shield volcano?
100
It is the source of an earthquake.
What is a focus?
100
Type of deformation when the rock is permanently deformed.
What is ductile deformation?
200
It is the Earth's prehistoric supercontinent.
What is Pangaea?
200
It is the intrusive rock of an oceanic plate.
What is gabbro?
200
Another name for strato-volcanoes.
What is composite volcanoes?
200
The area on the surface above the source of an earthquake.
What is an epicentre?
200
An upfold.
What is an anticline?
300
The forces which formed the Coast Range and the Rocky Mountains.
What are subductive forces?
300
Another term for ocean crust.
What is SIMA?
300
Cinder cones have these slopes.
What is 30-40 degrees?
300
It produces a wide zone of earthquake activity.
What is a subduction zone?
300
The stress applied in a strike-slip fault.
What is shear stress?
400
The period where the supercontinent starts to break up.
What is the Triassic Period?
400
The temperature needed to overcome the confining pressure to melt minerals or rocks.
What is pressure-melt point?
400
Causes a collapse of land following a volcanic eruption which results in the formation of a caldera.
What is the emptying of the magma chamber?
400
It is used to measure the intensity of an earthquake.
What is the modified Mercalli scale?
400
The type of fault due to tension.
What is a normal fault?
500
It is made of a light granitic block.
What is a continental plate?
500
Transport the weathered and eroded rock.
What are agents of erosion?
500
Known as "quiet" eruptions.
What are basalt eruptions?
500
The Richter evaluates this to measure the magnitude of an earthquake.
What is the energy produced by the earthquake?
500
Aside from tectonic activity, this process also causes crustal warping.