Plate Tectonics

Where are the youngest rocks on Earth found?

• Along mid-ocean ridges

• Along transform boundaries

• On the edges of the continents

• Near ocean trenches

Subduction zones occur along

• Transform boundaries

• Continental-Continental boundaries

• Divergent boundaries

• Oceanic-Continental boundaries

Subduction zones occur on Earth where dense oceanic crust dives under more buoyant continental crust. These boundaries are characterized by a deep ocean trench next to a high continental mountain range, large numbers of earthquakes and volcanoes. All of this is further evidence for the

• big bang theory.
• theory of plate tectonics.
• origin of the species.
• theory of natural selection.
  

The movement of the tectonic plates is caused by

• the rotation of the Earth.

• convection currents in the Asthenosphere

• the gravity of the iron-nickel core.

• the Moho discontinuity.

What is the process of convection?

• The process of hot material rising and cooler material sinking in circular patterns

• The process of hot rock solidifying and forming new crust

• The process of explaining what goes up must come down

• Strong ocean currents moving tremendous amounts of material

Ocean trenches are found along

• Transform boundaries

• Continental-Continental boundaries

• Divergent boundaries

• Oceanic-Continental boundaries

What is the source of energy that drives plate movement?

• the subducton of the sea floor

• the different densities of the oceanic and crustal plates

• convection currents in the asthenosphere

• the friction force between the plates that move past each other

How do the plates move along transform boundaries?

• They move towards one another

• They move away from one another

• They move past one another

• one moves up and one moves down

Where does seafloor spreading take place?

• Convergent boundaries

• The continentals shelves

• Transform boundary

• Mid-ocean ridges

The map in the picture shows tectonic plate boundaries. This map would be useful in predicting the location of future

• droughts

• hurricanes

• earthquakes

• tornadoes