Earth's Crust: Caves and Earthquakes

Lesson Plan - Get It!

Audio:

There are internal and external forces constantly changing the earth.

• Internal forces cause changes that happen inside the earth.
• External forces cause changes that happen outside the earth.

In this lesson, explore stalactites, stalagmites, and earthquakes.

As you learn, take notes on the Graphic Organizer – Notes, found under the Downloadable Resources in the right-hand sidebar.

Watch the video below for an introduction to caves. You can always pause to take notes!

Keep adding to your notes as you answer these questions.

• What is the difference between stalactites and stalagmites?
• How do they grow?

Check out What's the difference between stalactites and stalagmites? to learn more.

• How do you remove sapphires from the earth?
• What do you notice about a sapphire before it’s cut and after it’s cut?

Next, watch another video to learn about earthquakes. Remember to take notes!

• What causes earthquakes?
• What does a seismograph do?

After taking notes, move on to the Got It? section.