Plate Tectonics and Boundaries

The video explains the theory of plate tectonics, which describes Earth's lithosphere as divided into plates that move due to convection currents in the mantle. This movement causes geological features like volcanoes, mountain ranges, and ocean trenches. The video details the types of plate boundaries: divergent, convergent, and transform, and explains processes like subduction and mountain formation. It concludes with a discussion on the historical and future movement of continents.

What did Wilson observe about the Earth's lithosphere?

• It is made of liquid magma.

• It is a solid piece of rock.

• It resembles a broken eggshell with cracks.

• It is completely smooth.

What drives the movement of Earth's lithospheric plates?

• Solar radiation

• Ocean tides

• Convection currents in the mantle

• Wind currents

How fast are the North American and Eurasian plates moving apart?

• 1 centimeter per year

• 24 centimeters per year

• 10 centimeters per year

• 2.5 centimeters per year

What is a fault in the context of plate tectonics?

• A type of mountain

• A large ocean trench

• A volcanic eruption

• A break in Earth's crust where rocks slip past each other

Which of the following is an example of a transform boundary?

• East African Rift

• Himalayan Mountains

• San Andreas Fault

• Mid-Atlantic Ridge

What happens when two plates at a transform boundary get stuck?

• A rift valley forms

• A mountain range forms

• A volcano erupts

• An earthquake occurs

What forms at a divergent boundary in the ocean?

• A deep ocean trench

• A mid-ocean ridge

• A volcanic island

• A mountain range

What is a subduction zone?

• A place where two continental plates collide

• A location of volcanic eruptions

• A region where a denser plate descends beneath another plate

• A type of transform boundary

What forms when two continental plates collide?

• A rift valley

• A volcanic island

• A deep ocean trench

• A mountain range

How long has it taken for the continents to move to their current positions since the breakup of Pangaea?

• 500 million years

• 50 million years

• 100 million years

• 225 million years