Podcast
Questions and Answers
What is the outermost layer of the Earth called?
What is the outermost layer of the Earth called?
Crust
What is the second layer of the Earth called?
What is the second layer of the Earth called?
Mantle
What is the final layer of the Earth called?
What is the final layer of the Earth called?
Inner Core
Who came up with the theory of continental drift?
Who came up with the theory of continental drift?
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How many years ago did Alfred Wegener propose that all the continents were once joined together in a supercontinent called Pangaea?
How many years ago did Alfred Wegener propose that all the continents were once joined together in a supercontinent called Pangaea?
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What drives the movement of tectonic plates?
What drives the movement of tectonic plates?
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The magma inside the Earth cools down and moves sideways, causing the tectonic plates to move.
The magma inside the Earth cools down and moves sideways, causing the tectonic plates to move.
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When a continental plate collides with an oceanic plate, which plate is lighter and rises up?
When a continental plate collides with an oceanic plate, which plate is lighter and rises up?
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When a continental plate collides with an oceanic plate, what happens to the oceanic plate?
When a continental plate collides with an oceanic plate, what happens to the oceanic plate?
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What type of plate boundary occurs when a continental plate collides with an oceanic plate?
What type of plate boundary occurs when a continental plate collides with an oceanic plate?
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What is the name given to the area where an oceanic plate melts into the mantle?
What is the name given to the area where an oceanic plate melts into the mantle?
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What type of geological feature is formed above the Benioff zone?
What type of geological feature is formed above the Benioff zone?
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When two oceanic plates collide, one plate subducts under the other.
When two oceanic plates collide, one plate subducts under the other.
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What is the name given to the deep trench that is formed when two oceanic plates collide?
What is the name given to the deep trench that is formed when two oceanic plates collide?
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What is the process called when a denser plate slides beneath a less dense plate?
What is the process called when a denser plate slides beneath a less dense plate?
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Study Notes
The Earth
- Crust: Outer layer, made of rock and dirt
- Mantle: Second layer, made of magma and rock
- Outer Core: Third layer, made of magma
- Inner Core: Final layer, hottest layer, contains iron
Continental Drift
- Proposed by Alfred Wegener
- 225 million years ago, continents were joined as Pangaea
- Huge landmass; all continents were joined together
- Wegener's idea came from observing the shapes of continents
- Continents move due to convection currents
- Heated magma rises in the mantle
- Cools and moves sideways, causing plates to move
- Magma cools, restarting the cycle
Destructive Plate Boundaries
Continental on Oceanic
- Continental plate collides with oceanic plate
- Continental plate (lighter) rises
- Oceanic plate sinks into the mantle (subduction)
- Creates an ocean trench
- Benioff zone: Point where oceanic plate melts into the mantle
- Violent dome volcano forms above Benioff zone
Oceanic on Oceanic
- Oceanic plate collides with another oceanic plate
- One plate subducts (sinks)
- Forms an ocean trench
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Description
Test your knowledge on the Earth's structure, including its layers and the concept of continental drift proposed by Alfred Wegener. This quiz covers the processes involved in plate tectonics and how they shape our planet. Dive into the intriguing dynamics of Earth's crust, mantle, and core.
