Podcast
Questions and Answers
Which layer of the Earth is primarily composed of iron and is the hottest?
Which layer of the Earth is primarily composed of iron and is the hottest?
What term describes the process when the oceanic plate is forced down into the mantle?
What term describes the process when the oceanic plate is forced down into the mantle?
What was the name of the supercontinent proposed by Alfred Wegener?
What was the name of the supercontinent proposed by Alfred Wegener?
Which of the following best describes the movement of tectonic plates?
Which of the following best describes the movement of tectonic plates?
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What geological feature is created above the Benioff zone?
What geological feature is created above the Benioff zone?
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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 joined together
- Wegener's idea based on similar shapes of continents
- Plates move due to convection currents
- Heated magma rises in the mantle
- Cools, moving sideways, causing plates to move
- Cooled magma restarts 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
- Oceanic plate melts into mantle (Benioff zone)
- Forms violent dome volcanoes above the Benioff zone
Oceanic on Oceanic
- Oceanic plate collides with oceanic plate
- One plate sinks under the other
- Forms an ocean trench
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Description
This quiz explores the layers of the Earth, including the crust, mantle, outer core, and inner core. It also covers the theory of continental drift proposed by Alfred Wegener, and examines the interactions at destructive plate boundaries. Test your knowledge of these fundamental geological concepts!
