Plate Tectonics - Boundary Lesson

Tectonic Plates

Start Part 2

Drag and Drop

Which type of crust is denser? ​

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Which type of crust is thicker?​

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Which type of crust is mostly basaltic rock? ​

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Which type of crust is mostly granite?​

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Oceanic

Continental

Dropdown

If continental and oceanic crust are forced together the ​ ​

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crust ​

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because it is more dense and the ​ ​

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crust ​

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higher because it is less dense and thicker.

Plate Motion & Convection Currents

In the mantle, convection currents churn the molten rock material, moving the tectonic plates.

• A convection current is the continuous flow that occurs in a fluid because of differences in density

• Cool material is denser and sinks

• Warm material is less dense and rises

Mantle Convection

Multiple Select

Check all that are true about a convergent plate boundary.

• 2 plates collide

• It is destructive

• can produce trenches and volcanoes

• can produce mountain ranges

Multiple Choice

When an oceanic and continental plate collide, magma may reach the surface and form a

• oceanic volcanic arc

• continental volcanic arch

Drag and Drop

When a continental and oceanic plate meet at a tectonic boundary the ​

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plate is forced under the ​

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plate. Another way to say that is - the ​

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plate is ​

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under the ​

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plate.

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oceanic

continental

subducted

Multiple Choice

Which of the following best describes what it means to be subducted.

• raised up

• forced under

• replaced

Multiple Select

Check all that are true when an oceanic plate collides with another oceanic plate

• One of them are subducted

• Both of them are subducted

• a volcanic island arc may form

• a continental volcanic arc may form

Multiple Select

Check all that are true about a boundary where a continental plate meets another continental plate

• the smallest one is subducted

• neither one is subducted

• new complex mountain ranges form

• a continental volcanic arch is likely

Multiple Select

Check all that are true about a Transform boundary

• They are destructive

• They are constructive

• 2 plates slide past each other

• This boundary is the type most likely to cause earthquakes

• The San Andreas fault in California is this type of boundary

Multiple Choice

What do we call the long belt of volcanoes that circle the pacific ocean?

• Pacific Islands

• The Volcano belt

• Ring of Fire

• Firey hexagon

Drag and Drop

Sometimes volcanoes form away from plate boundaries. We call the areas where this happens ​

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. ​

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is an example of volcanoes happening away from plate boundaries.

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hot spots

Hawaii

Australia

Match

Match the following

• Continental-Oceanic convergent boundary

• Oceanic-Oceanic Convergent Boundary

• Continental-Continental Convergent

• Oceanic-Oceanic Divergent Boundary

• Transform Boundary

Oceanic plate subducted may cause a continental volcanic arc

One subducts under the other volcanic island arcs are common

Creation of complex mountain ranges

Also known as sea floor spreading - creates new ocean floor

also known as Strike-Slip

Plates slide past each other. Earthquakes common

• Oceanic plate subducted may cause a continental volcanic arc

• One subducts under the other volcanic island arcs are common

• Creation of complex mountain ranges

• Also known as sea floor spreading - creates new ocean floor

• also known as Strike-Slip

  Plates slide past each other. Earthquakes common