Plate Tectonics Review

What type of boundary occurs where two plates move together, causing one plate to descend into the mantle beneath the other plate?

• Transform fault boundary
• Divergent boundary
• Convergent boundary
• Transitional boundary

New ocean floor is most likely to form as movement occurs at which type of plate boundary?

• a divergent boundary
• a transform
• a subducting boundary
• a convergent boundary

What process is illustrated by the area labeled “A” in the figure above?

• Seafloor spreading
• Continental volcanism
• Rifting
• Subduction

The Rocky Mountains formed when the Pacific plate collided with the North American plate. Which of the following terms describes this process?

• ridge push
• divergent boundary
• transform boundary
• convergent boundary

One layer of Earth is composed mainly of liquid iron and nickel. This layer creates Earth's magnetic field, which protects Earth from solar wind. What is the name of this layer of Earth?

• the outer core
• the inner core
• the mantle
• the crust

In which layer of the Earth are the convections currents that directly result in tectonic plate motion?

• crust
• mantle
• outer core
• inner core

The cross section below shows the compositional layers of Earth. 
The layers are divided according to their chemical composition. Choose the letter or letters that best identify the core.

• A
• B
• A & B
• B & C

There are differences between the oceanic and continental lithospheric plates.  Which answer below best describes these differences?

• The continental lithospheric plates are thinner, denser and they are older than the oceanic lithospheric plates.
• The continental lithospheric plates are thicker, less dense and they are older than the oceanic lithospheric plates.
• The continental lithospheric plates are thinner, less dense and they are younger than the oceanic lithospheric plates.
• The continental lithospheric plates are thicker, denser and they are younger than the oceanic lithospheric plates.

Complete this sentence: As you go deeper inside the Earth ____________________.

• the temperature stays the same, but the pressure increases
• it gets cooler, drier, and easier to travel
• it gets hotter, materials get denser and pressure increases
• the temperature increases, but the pressure decreases

What drives the movement of Earth's tectonic plates, creating earthquakes and volcanoes?

• The movement of air currents pushing on the plates
• the convection of magma under the plates pulling them.
• the movement of Earth about its axis pulling on the plates.
• the convection of ocean currents above the plates pushing them.