Tectonics and Earthquakes

Earth’s mantle is made up of very hot material that rises to the top of the mantle,
cools, then sinks, reheats, and rises again, constantly repeating the cycle. This action, 
which causes the Earth’s crust to move, is known as—

• Convection currents
• magnetic feilds
• hot spots
• advection currents

What is an earthquake?

• A hole in the earth
• Shaking and vibration at the surface of the earth
• forest

One of Alfred Wegener’s problems in explaining his Theory of Continental Drift was —

• anti-german prejudice
• lack of evidence

A continental-oceanic boundary where plates collide is called a —

• Transform Boundary
• Subduction Zone 
• Sublimation Boundary
• Thrust Boundary

Where two plates rub past each other in opposite directions is a

• Divergent Boundary
• Convergent Boundary
• Hot Spot
• Transform Boundary

Where two plates move apart

• Convergent boundary
• Divergent boundary
• Transform boundary

When two plates come together

• Convergent Boundary
• Divergent Boundary
• Transform Boundary

Created by a divergent boundary.

• Rocky Mountains
• Mariana Trench
• Mid Atlantic ridge

Mountains form from ...

• plates sliding past one another
• collision of plates
• plates moving away from each other

What does the theory of continental drift state?

• The continents were once joined in a super-continent and have moved over time
• Continents are stationary and do not move
• The Earth is broken into lithospheric plates that move due to convection currents