Lesson 13

What causes mountains to shrink in elevation?

Lesson Objectives...

Apply mathematical concepts (proportional relationships and unit rates) from the unobservable processes of erosion and plate movement over time to figure out how much Mt. Everest and Mt. Mitchell are changing now and use these to predict how much they would change in the future.

6.4 Lesson 13 - Slides

Slide Presentation for Lesson 13...

This is the slide presentation used by your teachers when navigating through Lesson 13.

Watch the Erosion Timelapse. Record what you notice happening.

6.4 Lesson 13 Handout Erosion Rates

6.4 Lesson 13 Handout Erosion Rates vs.

Erosion rates are a representation of how much an area of land is worn down by all the erosive processes together. (Lesson 13)
Uplift rates are a representation of how much the land is being pushed up from below by plate movements. (Lesson 13)
The relationship between the erosion rates above the surface and the uplift rates below the surface determine the elevation above sea level. 1) Erosion rates that are higher than uplift rates result in land decreasing in elevation, 2) erosion rates that are less than uplift rates result in land increasing in elevation, and 3) erosion rates that are equal to uplift rates results in no change in elevation. (Lesson 13)

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