Plate Tectonics and Pangea

Which of the following statements is false?

• Continental crust is less dense than oceanic crust.

• Continental crust is made of granite.

• Continental crust is younger than oceanic crust.

• Continental crust is thicker than oceanic crust.

Plates move away from one another at ________ boundaries.

• divergent

• transform

• convergent

• submergent

The crust and the uppermost mantle make up the _________.

• lithosphere

• asthenosphere

• mesosphere

• thermosphere

The longest mountain chain in the world, the mid-Atlantic ridge, was produced by which boundary?

• divergent

• allegiant

• convergent

• transform

What would you likely find at a convergent boundary between two pieces of continental crust?

• volcano

• mountains

• rift

• ridge

In sea-floor spreading, molten material rises from the mantle and erupts

• along the edges of all the continents.

• along mid-ocean ridges.

• in deep-ocean trenches.

• at the north and south poles.

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Below is a picture of sea-floor spreading. How are the ocean crusts moving?

• Converging

• Diverging

• Sliding

• No movement

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The San Andreas Fault in California is known as an active earthquake area. What type of

boundary is it?

• Converging

• Diverging

• Transform

• Sea Floor Spreading

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Earth's lithospheric plates at a rate of a few _____________ every year.

• centimeters

• miles

• kilometers

• yards

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The Himalayas are an example of what happens at a?

• convergent boundary

• divergent boundary

• transform boundary

• allegiant boundary

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