Flashcards on Deriva dei continenti

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What is the theory of continental drift?

The theory that the continents were once joined together in a single landmass called Pangaea and have since drifted apart.

Who proposed the theory of continental drift?

Alfred Wegener

What evidence supports the theory of continental drift?

Fossil records, fit of continents, paleoclimate indicators, and matching rock formations.

What is the supercontinent that existed around 300 million years ago?

Pangaea

What are the major tectonic plates?

Eurasian Plate, African Plate, Indo-Australian Plate, North American Plate, South American Plate, Antarctic Plate, and Pacific Plate.

What is the process of the Earth's lithosphere plates moving?

Plate tectonics

What causes the movement of tectonic plates?

Convection currents in the Earth's mantle

What is a fault?

A fracture along which rocks have moved

What are the three types of plate boundaries?

Convergent, divergent, and transform boundaries

What happens at a convergent plate boundary?

Two plates collide, causing subduction, mountain formation, or volcanic activity.

What happens at a divergent plate boundary?

Two plates move apart, creating new crust and volcanic activity.

What happens at a transform plate boundary?

Two plates slide past each other horizontally, causing earthquakes.

What is the process by which new oceanic crust is formed?

Seafloor spreading

What is a hotspot?

An area of volcanic activity not related to plate boundaries

How does the theory of continental drift explain the distribution of fossils?

It suggests that fossils of the same species found on different continents were once part of the same landmass.

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Test Your Knowledge


Which scientist proposed the theory of continental drift?



What is the name of the ancient supercontinent suggested by the theory of continental drift?



Which of the following is evidence supporting the theory of continental drift?



What causes the movement of tectonic plates?



Which of the following is NOT a major tectonic plate?



What type of plate boundary is formed when two plates pull apart?



What happens at a convergent plate boundary?



What is the process by which new oceanic crust is formed?



What is a fault?



How does the theory of continental drift explain the distribution of fossils?




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