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- Explain how earthquakes and volcanoes provide evidence for Earth's inner layers.
- Understand Alfred Wegener's theory of continental drift.
- Discuss evidence that provides a mechanism for continental drift.
- List the causes of plate tectonic movement.
- Describe the different types of plate boundaries.
- Learn how plate movement contributes to different types of natural disasters.
1. Earthquakes and Volcanoes: Evidence of Earth's Inner Layers
The interior layers of the earth are not able to be observed directly, so scientists need to rely on other information to learn about it. S waves, P waves, and magma from volcanoes and earthquakes give a glimpse at the layers of the earth by providing data that can be built into a model of the earth.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. How Plate Movement Affects Earthquakes, Tsunamis & Volcanic Eruptions
Earthquakes, volcanoes, and tsunamis are all dangerous natural disasters, but they also have something else in common - tectonic plate movement. In this lesson, you'll see how these seemingly different events actually come from similar geological beginnings.
8. North American Plate: Tectonics, Movement & Facts
Learn about the North American Plate and how it is moving relative to other tectonic plates. In this lesson, we will explore the three major types of plate boundaries that you will find at the North American Plate's edge.
9. Plate Tectonics: Theory & Definition
Plate tectonics describes the internal workings of our planet. Using it allows geologists to explain a wide range of geologic features and processes. You will learn the basics about the theory in this lesson.
10. Ridge Push: Definition & Overview
In this lesson, we'll discuss ridge-push, which is one of the driving forces behind tectonic plate motions. We will also introduce the concept of volcanism at mid-ocean ridges.
11. Slab Pull: Definition & Theory
This lesson covers slab pull, which is one of the forces that affect tectonic plate motion. After this lesson, you will understand the mechanics of slab pull and how it factors into theory of plate tectonics.
12. What Is the Ring of Fire? - Definition, Facts & Location
The Ring of Fire has produced the world's most destructive and active volcanoes, not to mention most of the world's earthquakes. Read on to find out just what the Ring of Fire is and the volcanoes it has created throughout the planet's history.
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