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Students will review:
In this chapter, you'll learn the answers to questions including:
- What are the guiding principles behind the theory of plate tectonics?
- How does Alfred Wegener's theory explain continental drift?
- What are the seven primary plates found in the lithosphere?
- What are the three different kinds of plate boundaries?
- Why do tectonic plates move, and what is the supporting evidence?
- What happens to the ocean floor when tectonic plates diverge?
1. What is Pangaea? - Theory & Definition
The continents you know have existed for a long time, but not in their current locations. In fact, over 200 million years ago Pangaea broke apart by plate tectonic movement to form the continents we see today.
2. Plate Tectonics: A Unified Theory for Change of the Earth's Surface
After many years of trying to solve the mystery of the moving continents, enough data and evidence was collected to develop a unifying theory of how the surface of the earth changes. It's called plate tectonics.
3. Alfred Wegener's Theory of Continental Drift
People used to think that Earth was static, and that it never changed. Gradually, a body of evidence was gathered that made no sense in this model. Alfred Wegener, Geologic Supersleuth, laid the groundwork for a whole new theory for the large-scale changing nature of the earth.
4. Evidence for the Mechanism of Continental Drift
As scientists began to explore the ocean floor after World War II, they discovered many new clues to help them solve a mystery that had begun decades earlier - how the continents moved about on the surface of the earth.
5. Major Plates of the Lithosphere: Earth's Tectonic Plates
The outer shell of the earth, the lithosphere, is broken up into tectonic plates. The seven major plates are the African plate, Antarctic plate, Eurasian plate, Indo-Australian plate, North American plate, Pacific plate and South American plate.
6. Causes of Tectonic Plate Movement
In this lesson, we explore the causes of plate movement, including thermal convection, ridge push and slab pull. Students will learn how these processes complement each other and form a theory for tectonic plate movement.
7. Plate Boundaries: Convergent, Divergent, and Transform Boundaries
In the theory of plate tectonics, the earth's crust is broken into plates that move around relative to each other. As a result of this movement, three types of plate boundaries are formed: divergent, convergent, and transform boundaries.
Plate Boundaries List & Flashcards
This flashcard set describes the three main types of plate boundaries as well as specific landforms found at plate boundaries around the world. You will also identify plate boundaries according to diagrams.
9. Ocean Drilling as Evidence for Plate Tectonics
The Deep Sea Drilling Project extracted samples of the ocean floor that provided evidence to support the hypothesis of seafloor spreading and the theory of plate tectonics. Learn how these samples provided proof.
10. Paleomagnetism and Hot Spots: Evidence for Plate Tectonics
Paleomagnetism is the study of past magnetic fields. Hot spots are fixed pockets of heat that well up to form volcanic features. Learn how paleomagnetism and the study of hot spots provide evidence that supports the theory of plate tectonics.
11. Sea Floor Spreading and Polar Reversal
Sea floor spreading is the process by which new oceanic crust is formed by the upwelling of magma through diverging tectonic plates. Learn about the relationship between sea floor spreading and polar reversals detected on the ocean floor.
12. Sea Floor Spreading: Definition, Theory & Facts
The continents are on the move and sea floor spreading helps to explain how. Here you will learn what sea floor spreading is, how it works, where it is happening, and what led to its discovery.
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Other chapters within the College Earth Science: Help and Review course
- Earth Science Basics: Help and Review
- Geologic Time: Help and Review
- Properties of Matter: Help and Review
- Earth's Spheres and Internal Structure: Help and Review
- Minerals and Rocks: Help and Review
- Igneous Rocks: Help and Review
- Volcanoes: Help and Review
- Weathering and Erosion: Help and Review
- Sedimentary Rocks - A Deeper Look: Help and Review
- Metamorphic Rocks - A Deeper Look: Help and Review
- Rock Deformation and Mountain Building: Help and Review
- Water Balance: Help and Review
- Running Water: Help and Review
- Ground Water: Help and Review
- Glaciers: Help and Review
- Oceans: Help and Review
- Coastal Hazards: Help and Review
- The Atmosphere: Help and Review
- Weather and Storms: Help and Review
- Earthquakes: Help and Review
- Earth History: Help and Review
- Energy Resources: Help and Review