Theory of Plate Tectonics

The video explores the evolution of Wegener's theory of continental drift into the modern theory of plate tectonics. It explains that tectonic plates, composed of the Earth's crust and upper mantle, float on the denser asthenosphere. The video describes the characteristics of these plates, including their thickness and density, and highlights the major and minor plates, such as the Pacific and Juan de Fuca plates. It concludes by discussing how the movement of these plates leads to various geological events and features on Earth's surface.

What theory did scientists expand upon to develop the concept of plate tectonics?

• Theory of Evolution

• Theory of Gravity

• Theory of Relativity

• Theory of Continental Drift

What are tectonic plates primarily composed of?

• The Earth's core

• The crust and upper mantle

• The ocean floor

• The atmosphere

How thick are tectonic plates on average?

• 200 kilometers

• 100 kilometers

• 50 kilometers

• 10 kilometers

Which is the largest lithospheric plate?

• North American Plate

• Pacific Plate

• Eurasian Plate

• African Plate

What is the role of tectonic plate movements?

• They create weather patterns

• They are responsible for geological events

• They influence the Earth's magnetic field

• They determine ocean currents