Plate Tectonics Reteach

The movement of the tectonic plates is caused by

• the rotation of the Earth.

• convection currents in the Asthenosphere

• the gravity of the iron-nickel core.

• the Moho discontinuity.

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In some areas of the world, like California and Japan, earthquakes are a common occurrence. How can this best be explained?

• The strong ocean currents are undermining both areas causing earthquakes.

• Both areas are located near the edge of the Pacific Ocean, the unstable sand causes earthquakes.

• Both areas are subjected to strong ocean wind and waves that causes earthquakes.

• Both areas are on the boundary of active plates, the motion of the plates causes earthquakes.

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Observe this diagram of a plate boundary. One statement BEST describes what is happening. It is that

• the oceanic crust is melting.

• the denser ceanic crust is subducting under the less dense oceanic crust

• volcanic islands are forming.

• the tectonic plates are moving away from each other.

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What is the source of energy that drives plate movement?

• the subducton of the sea floor

• the different densities of the oceanic and crustal plates

• convection currents in the asthenosphere

• the friction force between the plates that move past each other

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NGSS.MS-ESS2-3

Scientists hypothesize that a super continent existed 200 million years ago.  This continent is called

• America
• Super Earth
• Pangea
• Eurasia

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A Plate Boundary where two plates move toward each other is called

• Convergent Boundary
• Divergent Boundary
• Transform Boundary
• Subduction

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During sea floor spreading, molten material rises up from the mantle...

• along the continents
• at the mid ocean ridges
• deep ocean trenches
• at north and south poles

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NGSS.MS-ESS2-1

Which of the following is where one plate slides under another plate?

• submarine zone
• divergence zone
• subduction zone
• lower zone

What is the difference between the lithosphere and asthenosphere that makes up the mantle?

• The lithosphere is ismade of dense solid meal whle the asthenosphere is made of liquid molten metal
• The lithosphere is a mixture of gasses while the asthenosphere is made of solid rock
• The lithosphere is molten rock that moves while the asthenosphere is ridid and thin
• The lithosphere is made of solid rock while the asthenosphere is more flexible hot rock that moves.

Divergent Plate movement can create

• Convection Currents
• Conduction
• Mountains
• Rifts and ocean ridges

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NGSS.MS-ESS2-3