Plate Tectonics

A plate boundary where two plates move away from each other is called

• Divergent Boundary
• Convergent Boundary
• Transform Boundary
• Subduction

What is the name of the single landmass that began to break apart 200 million years ago?

• Panthalassa
• Laurasia
• Gondwanna
• Pangaea

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

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

What is the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary?

• Subduction
• Induction
• Abduction 
• Reduction

What is the correct order (starting from the surface) of Earth’s layers?

• crust, outer core, inner core, mantle

• mantle, outer core, inner core, crust

• crust, mantle, outer core, inner core

• outer core, inner core, crust, mantle

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.

The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle is known as _______

• convection.

• continental drift.

• subduction.

• conduction.

Most geologists think that the movement of Earth’s plates is caused by _______

• convection.

• continental drift.

• subduction.

• conduction.

The geological theory of _______ states that pieces of Earth’s lithosphere are in constant, slow motion.

• subduction

• plate tectonics

• deep-ocean trenches

• sea-floor spreading

A place where two plates slip past each other, moving in opposite directions, and often cause earthquakes, is known as a _______

• transform boundary

• divergent boundary.

• convergent boundary.

• rift valley.