Causes of Plate Motions (Chapter 17 Section 4)

What is the tectonic process when convection currents rise and push Earth materials up from ocean ridges at Divergent Boundaries?

• Ridge Push

• Slab Pull

What is the tectonic process when convection currents fall and pull Earth materials down in subduction zones at Convergent Boundaries?

• Ridge Push

• Slab Pull

What is the transfer of thermal energy by the movement of heated material from one place to another?

• Convection

• Conduction

• Radiation

• Conversion

What is true about the process of convection?

• Hot material rises to the top

• Cold material falls to the bottom

• Hot material falls to the bottom

• Cold material rises to the top

Why does cold matter sink to the bottom during convection?

• Increases in density as it cools

• Decreases in density as it cools

Why does warm matter rise to the top during convection?

• Increases in density as it warms

• Decreases in density as it warms

In which layer of earth does convection occur?

• Crust

• Mantle

• Outer Core

• Inner Core

At which type of boundary does Ridge Push occur?

• Divergent Boundary

• Convergent Boundary

• Transform Boundary

At which type of boundary does Slab Pull occur?

• Divergent Boundary

• Convergent Boundary

• Transform Boundary

Convection currents in the mantle cause

• movement of the crust

• movement of the outer core

• movement of the mantle

• movement of the inner core