Show:
Just Driftin'
Plate Surfing
Dude, I have boundaries
It's Crusty
Below our feet
100
Who developed the theory of continental drift?
Alfred Wegner
100
What causes the movement of Tectonic Plates?
Convection currents in the Mantle
100
What type of boundary is made when two tectonic plates collide?
Convergent
100

Which crust is more dense: continental or oceanic?

Oceanic

100

What two elements is the inner core mostly made out of?

Iron & nickel

200

What type of feature forms at transform boundaries?

Faults

200
What do you call the area where two tectonic plates meet?
Plate Boundary
200

What type of boundary is the East African Rift?

Divergent

200

Where is volcanic activity more frequent at?

The edges of the plate boundaries

200

What are the 2 most common elements in the earth's crust?

Silicon & Oxygen
300

Mantle hot spots allow _______ & _______ to form 

Volcanoes and island arcs

300
What layer do the tectonic plates float on?
Asthenosphere
300
What is a boundary where two plates slide along each other?
Transform
300

Which crust is the oldest: continental or oceanic?

Continental

300

What is the outermost layer of the Earth called?

Crust

400

What four plates interact around the big Mid-Atlantic ridge?

N. American, Eurasian, S. American, and African

400

What is the main feature that forms at continental-oceanic converging plate boundaries? 

Trench

400

The Cascadia Fault is an example of a ________ plate boundary.

Subduction

400

Which crust is thinner: continental or oceanic? 

Oceanic

400

Which layer of the Earth is partially melted?

Asthenosphere

500
What happens when a continental plate converges with a continental plate?
Their densities are similar and result in both plates pushing upward into mountains
500
What is the theory that the earth's surface is broken up into large pieces that float on top of the asthenosphere?
The Plate Tectonic Theory
500

The type of tectonic plate boundary that sometimes has a subduction zone is ______.

Convergent Boundary

500
What is the raising of a rock layer?
Uplift
500

What hardens to form new rock at mid-ocean ridges?

Magma