Presentation on theme: "How Waterfalls Change Over Time"— Presentation transcript:
1How Waterfalls Change Over Time Lesson 5 – page 6
2Lesson Aims 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
6Activity – Draw and annotate the sketches 1467253The 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.
7Case study Sipi Falls, Uganda What benefits do Sipi Falls bring to local people?
8Explain the employment terms: Extension ActivityExplain the employment terms:Formal SectorInformal Sector.