Plate Tectonics Review

Which layer of Earth’s interior has convection currents that move the tectonic plates?

• A) Stiffer mantle

• B) Asthenosphere

• C) Outer core

• D) Inner core

How does the Oceanic crust compare to the Continental crust?

• A) The Oceanic crust is more dense

• B) The Oceanic crust is less dense

• C) The Oceanic crust has the same density as the Continental crust

The theory of continental drift suggests that the

• A) continents moved due to Earth's orbit around the sun

• B) continents moved due to Earth's rotation

• C) the continents are moving toward each other

• D) the continents once fit together like puzzle parts

The block diagram below represents the formation of an island arc near a plate boundary.

An island arc is located near the boundary between which two tectonic plates?

• Antarctic Plate and Indian–Australian Plate

• Philippine Plate and Eurasian Plate

• African Plate and North American Plate

• Scotia Plate and South American Plate

The cross section below represents a lithospheric plate boundary.

In which diagram do the arrows show the relative directions of plate movement at this type of plate boundary?

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Compared to the oceanic crust, the continental crust is

• more dense and more mafic

• more dense and more felsic

• less dense and more mafic

• less dense and more felsic

Which tectonic plate boundary is best represented by this diagram?

• Nazca Plate and Pacific Plate boundary

• Scotia Plate and South American Plate boundary

• Juan de Fuca Plate and North American Plate boundary

• Antarctic Plate and Indian-Australian Plate boundary

Which cross section best represents the convection currents in the mantle beneath the Peru-Chile Trench?

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The block diagram below shows the boundary between two tectonic plates.

• divergent

• convergent

• complex

• transform

At which plate boundary is one lithospheric plate sliding under another?

• Nazca Plate and Antarctic Plate

• Pacific Plate and Indian-Australian Plate

• Indian-Australian Plate and Antarctic Plate

• Nazca Plate and Pacific Plate