Section 1:  The Geosphere

Chapter 3 Section 1 Presentation
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Key Terms:

• geosphere
• crust
  
• mantle
• core
  
• lithosphere
  
• asthenosphere
  
• tectonic plate
  
• erosion
  

Main Ideas:

• The solid part of the earth that consists of all rock, and the soils and sediments on Earth's surface, is the geosphere.
• Earth's interior is divided into layers based on composition and structure.
  
• Earth's surface is broken into pieces called tectonic plates, which collide, separate, or slip past one another.
  
• Earthquakes, volcanic eruptions, and mountain building are all events that occur at the boundaries of tectonic plates.
  
• ​Earth's surface features are continually altered by the action of water and wind.