SC.7.E.6.5 Plate Tectonics

What is the most likely reason that there were no major earthquakes recorded in the interior of the continent of Africa?

• The plate boundary inside Africa is too small to form earthquakes.

• The landmass of Africa is too great to be affected by earthquakes.

• There are no faults in Africa

• The entire continent of Africa is located on a single continental tectonic plate.

Which type of stress causes deformation that leads to earthquakes at converging plate boundaries?

• tension

• stretching

• shear stress

• compression

Which letter represents the layer on which the tectonic plates move?

• A

• B

• C

• D

What does this figure show?

• covergent boundary

• divergent boundary

• transform boundary

• stationary plate boundary

What process does the figure show occurring in the mantle?

• Hot rock expands, becomes less dense, and rises toward the surface of Earth

• Hot rock expands, becomes more dense, and rises toward the surface of Earth.

• Hot rock becomes less dense and moves towards the outer core.

• Hot rock becomes more dense and moves towards the lithosphere.

What do the arrows closest to the ridge in this figure represent?

• slab pull

• ridge push

• convection current

• convergent boundary

At which of the following kinds of plate boundaries does seafloor spreading occur?

• convergent

• divergent

• transform

• stationary

What happens when the crustal plates move as shown in the figure?

• An ocean forms.

• Volcanic mountain ranges form.

• Sea-floor spreading occurs as the oceanic plate moves.

• A transform boundary forms where the subduction occurs.

What activity is happening at this boundary?

• A subduction zone is forming as two plates diverge.

• A rift valley is forming as two plates diverge.

• A subduction zone is forming as two plates converge.

• A mid-ocean ridge is forming as two plates converge.

What is occurring at the plate boundary shown in the diagram?

• a subduction zone has formed and nearby, volcanoes are forming and sea floor is being destroyed

• plates are moving away from each other and therefore, volcanoes are forming and sea floor is being built up

• a rift zone is forming, where volcanoes are forming and both plates are pulling away from each other

• a divergent boundary is growing, where volcanoes are forming and one plate is sinking beneath the other