Vocabulary
The thinnest layer of the Earth
What is the crust
Earthquakes occur along these cracks in the earth's surface.
What are faults
This type of plate boundary involves two plates moving apart from one another.
What is a divergent boundary?
This is the name of the proposed "supercontinent" where all the earth's continents were once joined together.
What is Pangaea?
Molten rock on the surface of the earth.
What is lava?
A number of rigid, but moving, pieces of Earth's surface
What is tectonic plates.
The point in which the earth first moves creating an earthquake.
What is a focus?
This type of plate boundary involves two plates moving toward each other.
What is a convergent boundary?
This is the meteorologist who first proposed the Theory of Continental Drift
Who is Alfred Wegener?
Molten rock beneath the surface of the earth.
What is magma?
The theory that all continents are fragments of Pangaea now drifting apart
What is the Continental Drift Theory
The point on the earth's surface directly above an earthquake.
What is the epicenter?
This type of plate boundary involves one plate sliding past another plate.
What is a transform boundary?
This is how many years ago earth's "supercontinent" began to split apart.
What is 200-250 million years ago?
This type of lava is fluid and hot producing shield volcanoes.
What is mafic lava?
States that youngest rocks of ocean floor are at divergin boundaries, moving outward
What is seafloor spreading
The fastest seismic wave.
What are P-waves?
This is the term for one plate being forced underneath another plate.
What is Subduction?
These are the two types of evidence that were initially used to support the Theory of Continental Drift.
What are similar shapes of coastlines and fossil evidence?
A flat slab-like intrusion of magma parallel to rock layers.
What is a sill?
Although the hottest layer of the Earth, this layer is solid metal
What is the inner core
The theory that rocks bend until they break.
What is the Elastic-Rebound Theory?
This is the term for the fracture created when one plate suddenly slides past another plate.
What is a fault?
This is the name of the "superocean" when all the earth's oceans were combined together
What is Panthelassa?
An intrusion that looks like an upside down lake.
What is a laccolith?