Plate tectonics

Mountains form from ...

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

Which of the following is where one plate slides under another plate?

• submarine zone
• divergence zone
• subduction zone
• lower zone

Associated with transform boundaries.

• Volcanoes
• mountains
• trenches
• earthquakes

Name the boundary

• convergent boundary
• divergent boundary
• transform boundary
• sergent boundary

Name the boundary

• convergent boundary
• divergent boundary
• transform boundary
• sergent boundary

Name the boundary

• convergent boundary
• divergent boundary
• transform boundary
• sergent boundary

The process by which molten material adds new oceanic crust to the ocean floor is called ___________.

• Divergent boundary
• Sea-floor spreading
• Convergent boundary
• Renovating 

What is an undersea mountain chain where new ocean floor is produced?

• Rift valley
• Deep-ocean trench
• Mid-ocean ridge
• Transform bounda

___________ is the theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle.

• Seismic waves
• Convection current
• Divergent boundary
• Plate tectonics

In sea-floor spreading, molten material rises from the mantle and erupts

• along the edges of all the continents.

• along mid-ocean ridges.

• in deep-ocean trenches.

• at the north and south poles.