Grade levels: 8-12

Lesson Objective: The Learner Will Be Able To:
  1. Describe the process of erosion
  2. Describe the process of volcanic reduction of mountain mass
  3. Describe isostatic compression
  • Computers with internet access
  • pens, paper
  • Handouts (below)
Lesson Process:

1. This lesson is designed to be a short lesson, to allow time for finishing presentations and beginning lesson 6, which is a long lesson. Allow only about 15-20 minutes for this lesson, and then use the rest of the time for the above purposes.

2. Distribute handouts and allow students time to complete them using the internet.

3. When presentations are finished, allow time for comparison and celebration. Perhaps you could invite another class in, so that the students could share their learning with small groups. Or, hold a parent’s night, when families can come in and learn from the students. Have some tea, coffee, juice, cookies and fruit for your visitors. Celebrate your students’ achievements!

Student Worksheet: Mountain Shrinking

If mountains are being built, slowly but surely, throughout the entire geologic history of the world, why aren’t they towering tens of thousands of metres high? What forces help to maintain balance on the earth’s surface? It is your job to find out more about processes which cause mountains to lose mass, to lose elevation, or to “shrink”.

1. Erosion (including glaciation):

2. Volcanic activity: