Khan Academy Plate Tectonics

The video explains different types of plate boundaries, focusing on divergent and convergent boundaries. It covers subduction zones where oceanic plates are pushed under continental plates, leading to mountain formation like the Andes. The video also discusses the subduction of the Pacific plate under the Filipino plate, forming deep trenches and underwater volcanoes that create islands. The Mariana Trench, the world's deepest trench, is highlighted. Finally, the collision of continental plates, such as the Indian and Eurasian plates, is explained, leading to the formation of the Himalayas.

What is the primary characteristic of divergent boundaries?

• Plates remain stationary.

• New crust is formed as plates move apart.

• Plates move towards each other.

• Plates slide past each other.

Which type of boundary is associated with the creation of new crust?

• Static boundary

• Convergent boundary

• Divergent boundary

• Transform boundary

Which mountain range is formed due to the subduction of the Nazca plate under the South American plate?

• The Andes

• The Alps

• The Himalayas

• The Rockies

What geological feature is commonly formed at subduction zones involving oceanic plates?

• Plateaus

• Deserts

• Deep trenches

• Rift valleys

What is the deepest trench in the world?

• Tonga Trench

• Mariana Trench

• Puerto Rico Trench

• Java Trench

How are the Mariana Islands formed?

• Through glacial movement

• By sediment deposition

• By volcanic activity from subduction

• Through erosion

What causes the formation of underwater volcanoes at oceanic subduction zones?

• Tectonic plate expansion

• Friction and heat from subduction

• Sediment accumulation

• Erosion of oceanic crust

What happens when two continental crusts collide?

• One crust is subducted under the other.

• They form a trench.

• They create mountain ranges.

• They form a rift valley.

Which plates are involved in the formation of the Himalayas?

• Indian and Eurasian plates

• Pacific and Filipino plates

• North American and Eurasian plates

• Nazca and South American plates

What is the height of Mount Everest compared to the depth of the Mariana Trench?

• Mount Everest is twice as high.

• The Mariana Trench is deeper.

• They are approximately the same.

• Mount Everest is higher.