About This Chapter
Shaping the Earth's Surface - Chapter Summary and Learning Objectives
The earth's topography can be reshaped through a variety of methods, including erosion and deposition. In the lessons of this chapter, our instructor shares her knowledge of how important landforms are created. You'll look at the formation of stream valleys, shorelines and rivers. Lessons also explore how natural events like volcanoes and earthquakes can alter natural habitats. When you finish this chapter, you'll have an understanding of:
- The ways topography is reshaped
- Effects of erosion and deposition
- Formation of stream valleys and rivers
- Dynamic characteristics of shorelines and beaches
- Ways that natural events and disasters can change habitats
|What Is Topography and How Is Topography Reshaped?||Explore how topography is reshaped by the weathering of rock and soil as well as the transportation and deposition of sediment.|
|Effect of Erosion and Deposition on Landforms||Examine the effect of erosion and deposition on landforms.|
|How a Landform Diagram Describes the Geological Progression of a Landscape||Correctly interpret a landform diagram's depiction of the geological progression of a landscape.|
|The Formation of Stream Valleys||Analyze how processes like erosion and deposition can form stream valleys.|
|Characteristics of Shorelines and Beaches||Outline the main geological characteristics of shorelines and beaches.|
|Beaches as Dynamic Systems||Explain the dynamic processes at work on a beach, in which sand is supplied by rivers and moved along the coast by the action of waves.|
|How Rivers and Streams Affect the Earth's Surface||Understand how rivers and streams are dynamic systems that erode, transport sediment, change course and flood their banks in natural and recurring patterns.|
|How Natural Events Change Habitats||Look at how natural events like earthquakes, volcanoes, landslides and floods can change human and wildlife habitats.|
1. What Is Topography and How Is Topography Reshaped?
The topography, or surface of the Earth, is constantly changing shape due to many powerful forces. In this lesson, we will learn about some of the amazing changes that occur on Earth due to the processes of weathering, erosion, and deposition.
2. Effect of Erosion and Deposition on Landforms
Landforms are constantly being broken down and reformed by the processes of weathering, erosion, and deposition. In this lesson, we explore chemical and physical weathering and how the face of the earth gets changed.
3. How a Landform Diagram Describes the Geological Progression of a Landscape
This lesson describes what a landform diagram is. We'll also discuss some basic laws of geology that can help scientists deduce both the order of events that create a landform and the geologic events that occur after a landform's formation.
4. The Formation of Stream Valleys
Running water is very powerful and has the ability to change the land around it. In this lesson, we will explore the creation of stream valleys and how they are shaped by the water that runs through them.
5. Beaches as Dynamic Systems
Did you know that lava can create sand or that beaches change with the seasons? In this lesson, we will explore how beaches are formed and why they are constantly changing, due to the action of waves and the movement of sediment supplied by rivers and streams.
6. How Rivers and Streams Affect the Earth's Surface
Rivers and streams are powerful, ever-changing systems that can alter the surface of the Earth. While they share many similar features, they can be vastly different. In this lesson, we will learn how rivers and streams form, transport sediment, and flood.
7. How Natural Events Change Habitats
Natural events, like earthquakes, volcanic eruptions, landslides and floods, can be very powerful and destructive. In this lesson, we will see firsthand how they can change human and wildlife habitats in both damaging and helpful ways.
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Other chapters within the Earth Science: Middle School course
- Earth's Spheres & Structure
- Understanding Plate Tectonics
- Understanding Earthquakes
- Understanding Volcanoes
- Rock Deformation & Mountain Building
- Thermal Energy
- Energy in the Earth System
- Ecology & Ecosystems
- Earth's Energy Resources
- Earth's Material Resources
- Earth Science Investigation & Experimentation