Unit 1 - Layers of the Earth and Plate Tectonics

Who is the scientist who proposed Continental Drift Theory?

• Albert Einstein
• Alfred Wegener
• Isaac Newton
• John Dalton

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Most geologists think that the movement of Earth's tectonic plates is caused by

• the rotation of the Earth.

• the Earth's magnetic field.

• subduction.

• convection currents.

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Associated with transform boundaries.

• Volcanoes
• mountains
• trenches
• earthquakes

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A location where two tectonic plates collide is known as a _________ boundary.

• Convergent
• Divergent
• Transform
• Spreading

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When plates collide we get ________.

• crumbles

• volcanos

• trenches

• mountain ranges

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Which layer of Earth flows slowly and causes the crust to move?

• Crust

• Mantle

• Inner Core

• Outer core

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What is the correct order (starting from the surface) of Earth’s layers?

• crust, outer core, inner core, mantle

• mantle, outer core, inner core, crust

• crust, mantle, outer core, inner core

• outer core, inner core, crust, mantle

Subduction means.....

• one plate goes under another plate

• two plates slide past each other

• two plate collide and form folded mountains

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Sea-floor spreading explains how.....

• new crust is created at a divergent boundary

• volcanoes are formed on continents

• deep sea trenches are formed

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A long chain of undersea mountains

a

sea floor spreading

mid ocean ridge

oceanic plates

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