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Lesson 5 – page 6. To learn that waterfalls change over time. To learn that waterfalls retreat backwards. To learn that when a waterfall retreats a gorge.

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Presentation on theme: "Lesson 5 – page 6. To learn that waterfalls change over time. To learn that waterfalls retreat backwards. To learn that when a waterfall retreats a gorge."— Presentation transcript:

1 Lesson 5 – page 6

2 To learn that waterfalls change over time. To learn that waterfalls retreat backwards. To learn that when a waterfall retreats a gorge is formed. To learn that Sipi falls brings benefits as a tourist attraction. Key Skill = Communication

3 Hard Rock Soft Rock Lip Plunge Pool

4 Processes Undercutting Abrasion Hydraulic Action

5

6 The hard rock forms a lip. The waterfall retreats backwards leaving a gorge. Hard rock overlies soft rock. Erosion of the plunge pool causes undercutting. The soft rock is eroded to form a deep plunge pool. The undercut lip collapses into the plunge pool. Soft rock beneath the hard rock is more easily eroded. 1467 25 3

7 What benefits do Sipi Falls bring to local people?

8 Explain the employment terms: Formal Sector Informal Sector.


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