Understanding Plate Tectonics

What revolution in the 1960s changed our understanding of Earth's structure?

• The Scientific Revolution

• The Plate Tectonics Revolution

• The Digital Revolution

• The Industrial Revolution

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Who proposed the theory of continental drift in 1912?

• Isaac Newton

• Albert Einstein

• Charles Darwin

• Alfred Wegener

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What did the first physiographic map of the Atlantic ocean floor reveal?

• A large abyss

• An extensive underwater city

• A vast mid-Atlantic mountain spine

• A flat and featureless plain

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What theory did Harry Hess propose regarding the seafloor?

• Oceanic Conveyor Belt Theory

• Flat Earth Theory

• Seafloor Spreading Theory

• Deep Sea Trench Theory

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What confirmed the matching patterns of magnetic histories in the seafloor?

• Fossil records

• Underwater drilling

• Satellite imagery

• The age of basalt rock

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What is the significance of the Pacific Ring of Fire?

• It is a major tourist attraction

• It is a large mining site

• It is the hottest place on Earth

• It is home to 75% of the world's volcanoes

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What forms at a divergent plate boundary?

• Mountains

• Volcanoes

• New seafloor

• Earthquakes

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What happens when two continental plates collide?

• One plate is subducted

• A deep trench forms

• Huge mountain ranges are pushed up

• The plates dissolve

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Why is Earth's plate tectonics compared with Venus?

• To find water on Venus

• To understand why Earth has plate tectonics and Venus doesn't

• To predict Earth's future climate

• To search for life on Venus

What role do continental collisions play in Earth's evolution?

• They supply large pulses of nutrients to the biosphere

• They cause mass extinctions

• They have no significant impact

• They prevent life from evolving

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