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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?
Isaac Newton
Charles Darwin
Alfred Wegener
Marie Curie
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What is the name of the ancient supercontinent suggested by the theory of continental drift?
Pangea
Atlantis
Pangaea
Lemuria
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Which of the following is evidence supporting the theory of continental drift?
Photosynthesis
Gravity
Fossil records
Radioactivity
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What causes the movement of tectonic plates?
Electromagnetic waves
Solar wind
Convection currents
Friction
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Which of the following is NOT a major tectonic plate?
Indian Plate
Eurasian Plate
Antarctic Plate
South American Plate
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What type of plate boundary is formed when two plates pull apart?
Convergent boundary
Transform boundary
Divergent boundary
Fault boundary
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What happens at a convergent plate boundary?
New crust is formed
Two plates slide past each other
Two plates collide
Volcanic activity
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What is the process by which new oceanic crust is formed?
Seafloor spreading
Subduction
Trench formation
Magnetic reversal
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What is a fault?
A type of rock
A species of dinosaur
A fracture along which rocks have moved
A type of volcano
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How does the theory of continental drift explain the distribution of fossils?
Fossils are created by volcanic eruptions
Fossils are remnants of ancient animals
Fossils indicate that continents were once connected
Fossils provide evidence of early human civilizations
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