Earth's Crust 3 - Caves and Earthquakes

Contributor: Victoria Surface. Lesson ID: 10501

Ever been in an earthquake or explored a cave? One is scary, the other is amazing! How do they happen? With Bill Nye, online games, NOAA, and neat projects, learn about what goes on inside the Earth!


Earth Science

learning style
Auditory, Visual
personality style
Lion, Otter
Grade Level
Intermediate (3-5)
Lesson Type
Dig Deeper

Lesson Plan - Get It!


What happened to cause these huge cracks in the road?

This lesson is 3 of 3 about how the earth changes and how Earth’s features are formed.

Each Related Lesson found in the right-hand sidebar digs deeper into topics such as the earth’s crust, layers of the earth, volcanoes, plate tectonics, and geysers. You can complete them individually, or as a set, to explore and understand the changing earth.

There are internal and external forces that are constantly changing the Earth. Internal forces cause changes that happen inside Earth. External forces cause changes that happen outside the Earth. In this lesson, you will explore stalactites, stalagmites, and earthquakes.

1. Watch Earth’s Crust Bill Nye the Science Guy 3/3. As you watch, pause the video to take notes using the Graphic Organizer – Notes, which can be found in the Downloadable Resources in the right-hand sidebar. Use the questions below as a guide to assist you in note taking.

  • What is the difference between stalactites and stalagmites (
  • How do you remove sapphires from the earth?
  • What do you notice about a sapphire before it’s cut and after it’s cut?
  • What does a seismograph do?
  • Why do scientists think the earth has a solid core?
  • What causes earthquakes? Learn more about earthquakes by watching How Do Earthquakes Happen?.

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