What does the theory of plate tectonics explain?

• The movement of geologic plates causes mountain building, volcanoes, and earthquakes.

• The formation of the solar system.

• The process of photosynthesis in plants.

• The water cycle on Earth.

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Who proposed the concept of continental drift?

• Alfred Wegener

• Harry Hess

• John Tuzo Wilson

• Isaac Newton

What geological formation is an example of tectonic plate interaction?

• The Himalaya mountain range

• The Amazon Rainforest

• The Sahara Desert

• The Great Barrier Reef

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What did Harry Hess propose about the ocean floor?

• Molten rock rising from the asthenosphere creates new crust and spreads the seafloor.

• The ocean floor is static and unchanging.

• The ocean floor is made entirely of sand.

• The ocean floor is the oldest part of Earth's crust.

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How are volcanic island chains like the Hawaiian Islands formed according to John Tuzo Wilson?

• By fixed 'hot spots' in the mantle forcing magma upward.

• By the collision of tectonic plates.

• By erosion of the sea floor.

• By the accumulation of coral reefs.