Vocabulary
Our continents came from a big chunk of land that existed between 300 and 200 million years ago. What is the name of the supercontinent?
Pangea
Give the three types of plate boundaries
Convergent Boundary, Divergent Boundary, and Transform Boundary
At this type of plate boundary, tectonic plates slide past each other horizontally.
Transform boundary
The Himalayan mountains are the result of a ___________________________ boundary.
Convergent
The theory that all continents are fragments of Pangaea now drifting apart
Continental Drift Theory
This boundary is caused by compressional stress—a force that pushes the tectonic plates together.
Convergent Boundary
A divergent boundary is also known as a __________ __________.
Constructive boundary
This type of plate boundary formed the East African Rift Valley.
Divergent boundaries
It refers to the lines at the edge of the different pieces of the lithosphere.
Plate Boundaries
In Oceanic Plate - Continental Plate, the oceanic crust bends because they are _____ and _____ than the continental crust.
denser, thinner
It occurs above a rising convection current, where the rising magma flows laterally, shifting the plates in the direction of the flow.
Divergent boundary
The San Andreas Fault in California is an example of what type of boundary?
Transform boundary
It states that the surface of our planet is composed of large and small broken lithospheric plates that are moving slowly and constantly.
Plate Tectonic Theory
This is the mechanism that causes the plates to move
Convection Cycle
The boundary where one plate is forced below another, creating trenches, mountain, and volcanic activity.
Convergent boundary
Earthquakes, volcanoes, and mountain ranges are usually linked to these.
Plate boundaries
A geologic process where the youngest rocks of the ocean floor are in divergent boundaries. It occurs during the formation of mid-ocean ridges.
Seafloor spreading
Rift Valley is an example of a ____________________ boundary and it occurs between two ____________ plates that move away from each other.
divergent, continental
The separation of plates allows the _________—the Earth’s upper mantle that lies below the lithosphere—to rise towards the surface and partially melt.
Asthenosphere
Subduction zones at convergent boundaries are known for forming this type of underwater feature.
Oceanic trenches