U-shaped Valleys and Hanging Valleys - PowerPoint Presentation

1. U-shaped Valleys and Hanging Valleys

2. 1Date: 18/06/2021Title: U-shaped valleys and Hanging valleyLook, cover, write, checkDescribe what you can see in the imageWhat can you remember?Write down the following three spellings. ErosionAbrasionPlucking 2What is an erratic?What are the three main climates in the Middle East?

3. To explain how U-shaped Valleys and Hanging Valleys are formed by glaciers.What are we doing today?What topics have we studied before?Last Topics:Rivers: Processes Coasts: ProcessesLast lesson: Corries, Arêtes and Pyramidal PeaksHow does this link to previous topics?We have looked at the formation of Corries, Arêtes and Pyramidal Peaks.We are not going to look at a landform that follows on from these three landforms: U-shaped Valleys and Hanging Valleys. We are going to use our knowledge of glacial erosion, transportation and deposition to explain how these valleys form.

4. KeywordsErosionDepositionTransportationThe wearing away of pieces of rock, soil or other solid materials through being displaced by wind and water.The dropping down of material, due to loss of energy.The movement of material from one place to another.

5. Identify – A or B: Which is a U-shaped valley? Which is a V-shaped valley?Describe – The difference between the two landformsExplain – How might glaciers transformed landform A into landform B Analyse – What glacial processes might have been responsible for this transformation?IDEA

6. Where we left off…Last lesson, we looked at corries, pyramidal peaks and arêtes. The landforms we are looking at today follows on from that.A series of glaciers from small corries would flow down-slope from the hollow on the mountains where they formed.They slowly join together to form one large glacier—like tributaries flowing into a main river.These create U-shaped valleys and Hanging valleys.

7. U-shaped ValleyGlaciers take the easy route down a mountain. They follow old river valleys.Up in the mountains, a river carves out a V-shaped valley. But when a glacier bulldozes its way down the valley……it widens and deepens it, through abrasion and plucking. The valley becomes U-shaped—a valley with steep sides and flat bottom..When the glacier melts, a river may flow again. Now it’s in a wider valley it did not erode. It is called a misfit river.

8. U-shaped ValleyIn your sheets, draw a diagram of the formation of U-Shaped valleys.Keyword box for labelsv-shapedglacierabrasionpluckingsteep sidesflat bottomwidermisfit riverIn your sheets, draw a diagram of the formation of U-Shaped valleys.ChecklistKeep it simple!Label any features (e.g. v-shaped, steep sides) and stages (before ice age)Write an explanation of what is happening underneathIn your sheets, draw a diagram of the formation of U-Shaped valleys.

9. Hanging ValleysA hanging valley is a small valley that hangs above a larger one.Imagine a large deep glaciers moving along a valley. A smaller one joins it. The smaller one is much less deep as less ice means less erosional power.Then, when the ice melts, it reveals the smaller valley hanging above the larger one.If a river flows in the smaller valley, it will splash into the larger valley as a waterfall.

10. Rivers and Lakes in U-shaped ValleyRibbon lakes may also form.A ribbon lake is a large, narrow lake occupying a U-shaped valley. It forms in a hollow when a glacier has more deeply eroded less resistant rock, making a trough. When glaciers melts, the trough fills up with water, forming a Ribbon lake.Often, you would see a misfit river.After the ice, the river that flows in the U-shaped valleys seems far too small for the huge valley it did not erode.Ribbon lakes in Buttersmere, Lake District

11. Explain why there is a small valley hanging over a large valley in the photo.Explain how these two lakes formed in the valley floor.Keywords:smaller glacierlarger glacieru-shaped valleytributaryjoinless deepless iceless erosionmeltswaterfallWrite in BLT!Keywords:narrow lakehollowless resistant rockTroughmelt

12. Explain why there is a small valley hanging over a large valley in the photo.Keywords:smaller glacierlarger glacieru-shaped valleytributaryjoinless deepless iceless erosionmeltswaterfallThe landform in the photo is called… This is when a small valley hangs over a larger valley.Hanging valleys form because…This leads to…Therefore…

13. Today – Where do the glaciers that carve out u-shaped valleys come from?Last Lesson – What happens to the hollow of corries when ice melt?Last topic – Name an opportunity of diversity in the Middle East.What new knowledge have you learnt today?

14. Lesson Resources to Print

15. Formation of a U-Shaped ValleyFormation of a U-Shaped ValleyU-shaped valley starts off as v-shaped valleys. However…U-shaped valley starts off as v-shaped valleys. However…

16. Formation of a U-Shaped ValleyFormation of a U-Shaped ValleyU-shaped valley starts off as v-shaped valleys. However…U-shaped valley starts off as v-shaped valleys. However…

17. Depositional Landforms

18. 1Date: 18/06/2021Title: Depositional landformKnowledge Organiser Sheet______% of Earth was covered in ice sheetsWho or what was living in the UK 20,000 years ago?________________ are thick layer of ice that covers large areas of the Earth’s surface._________________ are Glaciers that form on mountainsides and move down slope.Why do glaciers form in polar and upland areas?__________ is a type of erosion when glacial ice plucks loosened pieces of rock at the bedrock.__________ is a type of erosion when rocks trapped in the ice scrape against the bedrock.____________ is when water enters in crack, freezes and expands causing pressure on the surrounding area and breaking up the rock.2

19. 1Date: 18/06/2021Title: Depositional landformKnowledge Organiser Sheet______% of Earth was covered in ice sheetsWho or what was living in the UK 20,000 years ago?________________ are thick layer of ice that covers large areas of the Earth’s surface._________________ are Glaciers that form on mountainsides and move down slope.Why do glaciers form in polar and upland areas?__________ is a type of erosion when glacial ice plucks loosened pieces of rock at the bedrock.__________ is a type of erosion when rocks trapped in the ice scrape against the bedrock.____________ is when water enters in crack, freezes and expands causing pressure on the surrounding area and breaking up the rock.230No humans were living in the UK (1), but animals (e.g. woolly mammoths) were (1)Ice sheetsAlpineTemperature are near freezing point, (1) allowing ice to accumulate (1)PluckingAbrasionFreeze-thaw weatheringOut of 10

20. 1Date: 18/06/2021Title: Depositional LandformsLook, cover, write, checkDescribe what you can seeWhat can you remember?Write down the following three spellings. DepositionMeltwaterMoraine Why do glaciers deposit rocks?What is the largest religious group in the Middle East?2

21. KeywordsDepositionMoraineMeltwaterThe dropping down of material, due to loss of energy.Frost-shattered rock debris and material eroded from the valley floor and sides, transported and deposited by glaciersThe movement of material from one place to another.

22. Describe and explain the depositional landforms formed by glaciersWhat are we doing today?What topics have we studied before?Glacial processes: Erosion, weathering, transportation and depositionGlacial Landforms: Corrie, Arête, Pyramidal Peaks, Hanging Valley and U-Shaped ValleysHow does this link to previous topics?We are going to apply our understanding of how glacial processes shape the landscape by looking at depositional landforms formed by glaciers.

23. IDEAIdentify – What can you see in the image. Describe – The landscape that you can see.Explain – How do you think this boulder got in the middle of the field?Analyse – What glacial processes would be responsible for shaping this landscape.

24. Glacial depositionGlaciers carry a lot of materials as it moves down-slope.At the snout of the glacier, the ice melt, causing glacial till (rock debris) to be deposited).Most deposition takes place in warmer lowland areas where glaciers melt, leaving a thick layer of till. Two main groups of landforms are created as a result:Those formed directly from iceThose formed from the meltwater that flows from the melting glacier.

25. Types of MoraineAs glaciers melt and recede, large ridges or moraines of loose debris are left behind. There are three main types of moraine:Lateral moraine – Debris at the sides of the glacier.Medial moraine – ridges of debris in the middle of the glacier. It is formed when the lateral moraine of two glaciers meet and merge together in the middle.Terminal moraine – debris deposited at the snout of the glacier.

26. Types of Moraine_______ ________ are debris found at the sides of glaciers.Medial moraine are ridges of ______ found in the _____ of glaciers._________ moraine are deposited at the ______ of glaciers.Keyword Box:TASK: In your books, complete the sentences. Choose from the keyword box below. Lateral moraineTerminalsnoutmiddledebris In your books, write down what a synonym for ‘lateral’, ‘terminal’ and ‘medial’ to help you remember where the moraine is located e.g. ‘terminal = terminate or end’Lateral morainedebrismiddleTerminalsnout

27. Glacial DepositionBUT! There are other depositional features created by glaciers.Erratics are stray rocks which are ‘out of place’ from there surrounding. A glacier can carry huge rocks and drop them when it melts. They may be a long way from where they started and look very different from the surrounding rocks.Drumlins are low hills, shaped like the back of a spoon. Experts are not sure how they’re formed, but all agree that the smooth shape is due to glacier flowing over deposited material.

28. Copy and complete the table below using Diagram A.Why do you think large boulders deposited by glaciers are called erratics?Glacial landform depositionDescription of landformExplanation of how the feature is formedErraticsDrumlinMoraineOutwash plainsGlacial tillChecklist:Detail (e.g. how long is the landform? Keywords (e.g. deposit, glacial till)Glacial processes

29. Copy and complete the table below using Diagram A.Description of landformExplanation of how the feature is formedErraticsLarge boulders that are ‘out of place’ from the surrounding area.Glaciers transport the boulders a considerably distance from their origin and deposited when the ice melts.

30. Today – What is a medial moraine?Last Lesson – What is a hanging valley?Last topic – What is a challenge of ethnic and religious diversity?What new knowledge have you learnt today?

31. Lesson Resources to Print

32. __________ ___________ are debris found at the sides of glaciers.Medial moraine are ridges of ________ found in the _______ of glaciers.__________ moraine are deposited at the _________ of glaciers.__________ ___________ are debris found at the sides of glaciers.Medial moraine are ridges of ________ found in the _______ of glaciers.__________ moraine are deposited at the _________ of glaciers.__________ ___________ are debris found at the sides of glaciers.Medial moraine are ridges of ________ found in the _______ of glaciers.__________ moraine are deposited at the _________ of glaciers.__________ ___________ are debris found at the sides of glaciers.Medial moraine are ridges of ________ found in the _______ of glaciers.__________ moraine are deposited at the _________ of glaciers.__________ ___________ are debris found at the sides of glaciers.Medial moraine are ridges of ________ found in the _______ of glaciers.__________ moraine are deposited at the _________ of glaciers.__________ ___________ are debris found at the sides of glaciers.Medial moraine are ridges of ________ found in the _______ of glaciers.__________ moraine are deposited at the _________ of glaciers.__________ ___________ are debris found at the sides of glaciers.Medial moraine are ridges of ________ found in the _______ of glaciers.__________ moraine are deposited at the _________ of glaciers.__________ ___________ are debris found at the sides of glaciers.Medial moraine are ridges of ________ found in the _______ of glaciers.__________ moraine are deposited at the _________ of glaciers.

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34. Glacial landform depositionDescription of landformExplanation of how the feature is formedErraticsDrumlinMoraineOutwash plainsGlacial till

35. Knowledge Organiser Quiz on ___________Study Boxes 1, 2 and 3