Plate Tectonics Study Material

According to the Theory of Plate Tectonics, the Earth’s crust looks like:

• A single solid piece

• A series of large and small plates

• A liquid layer

• A gaseous layer

What does the Plate Tectonic Theory state about the plates?

• The plates are stationary.

• The plates move slowly over the Earth's surface.

• The plates are made of water.

• The plates are invisible.

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What is a plate boundary?

• Where two or more plates meet

• The single mass of land

• Where two or more landforms meet

• Where the oceans interact

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What causes the plates to move?

• Earthquakes

• Volcanic eruptions

• Convection currents in the mantle

• Wind patterns

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Where do convection currents happen in the Earth’s layers?

• Crust

• Mantle

• Core

• Lithosphere

During a convection current,

• Warmer magma sinks and cooler magma rises

• Warmer magma rises and cooler magma sinks

• Magma moves in no specific pattern

• Plates rise and sink below sea level

What is the difference between continental and oceanic crust?

• Continental crust is thicker and less dense than oceanic crust.

• Oceanic crust is thicker and less dense than continental crust.

• Continental crust is thinner and more dense than oceanic crust.

• Oceanic crust is thinner and less dense than continental crust.

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Why does the oceanic crust always subduct when a continental and oceanic plate meet?

• Because it is denser

• Because it is lighter

• Because it is thicker

• Because it is older

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Where do earthquakes and volcanoes occur?

• At the boundaries of tectonic plates

• In the middle of tectonic plates

• Only in oceanic regions

• Only in continental regions

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What are the three types of plate boundaries?

• Divergent, Convergent, Transform

• Continental, Oceanic, Subduction

• Erosional, Depositional, Transform

• Convergent, Divergent, Erosional