Convection Currents Video

Who first proposed the theory that continents were once joined together and have since drifted apart?

• Albert Einstein

• Alfred Wagner

• Charles Darwin

• Isaac Newton

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What was the major issue with Alfred Wagner's theory of continental drift?

• He was ahead of his time

• He didn't believe in his own theory

• He couldn't explain the force behind the movement

• He couldn't identify the continents

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Which mechanism describes the movement of tectonic plates due to the heat from the Earth's core?

• Mantle convection

• Slab pull

• Slab suction

• Ridge push

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What causes ridge push in plate tectonics?

• Ocean currents

• Temperature differences

• Magnetic field

• Gravity

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What is the main driving force behind slab pull?

• Centrifugal force

• Gravity

• Solar radiation

• Thermal expansion

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How does slab suction contribute to plate movement?

• By small scale convection currents

• Using tidal forces

• Through magnetic attraction

• By creating a vacuum

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Approximately how fast do tectonic plates move each year?

• 10 cm

• 1 cm

• 1000 cm

• 100 cm

What type of plate boundary occurs when two plates move towards each other?

• Convergent

• Divergent

• Static

• Transform

Which plate boundary is characterized by plates moving away from each other?

• Convergent

• Divergent

• Static

• Transform

What is the name of the plate boundary where plates slide past each other in opposite directions?

• Transform

• Divergent

• Convergent

• Static