7. Beaches and sand dunes

Beaches and sand dunes

1. Big Picture Beaches Different types Formation Characteristics Beach profile How they change Diagram Beach A zone of deposited material that extends from the low water line to the limit of storm waves. Key Vocabulary Page 100 02 May 2019 Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

2. You can describe the characteristics and formation of beaches. You use a limited range of specialist terms You have a reasonable accuracy in the use of spelling, punctuation and grammar. You can outline the characteristics and formation of beaches. You use a good range of specialist terms You have a considerable accuracy in spelling, punctuation and grammar. You explain the characteristics and formation of beaches. You use a wide range of specialist terms where appropriate. Accurate use of spelling, punctuation and grammar. Learning Outcomes – Success Criteria L3 - Detailed Answer L2 - Clear Answer L1 - Basic Answer Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

3. Pebble beaches are generally steep whilst sandy beaches are generally shallow and almost flat. The distance the beaches stretch inland is not very far when the beach is made up of pebbles however when the beach is made up of sand, they do stretch a long way inland. Constructive waves are dominant at sandy beaches whilst destructive waves are dominant at pebble beaches. Towards the back of a sandy beach, there may be sand dunes whereas pebble beaches will have larger pebbles at the back. How are Sand & Pebble Beaches Different? Information Slide Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

4. Contrasting beaches How are these two beaches different? How can processes account for these differences? Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

5. EDEXECL GCSE GEOGRAPHY A TEACHING AND LEARNING RESOURCES Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

6. How are Sand & Pebble Beaches Different? Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

7. Extension: A sandy beach at low tide Draw a labelled sketch to show the features of this beach. [4 marks] Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

8. Which beach does the characteristic belong to? Shallow, almost flat Sandy OR Pebble Has large pebbles at the back Sandy OR Pebble Stretches quite long inland Sandy OR Pebble Destructive waves are dominant Sandy OR Pebble How are Sand & Shingle Beaches Different? Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

9. Produced by Mr M Colclough Use the information slides to help you fill out all sections of your sheet. Explain what a beach profile is and how they change in the bottom box. Use the information slide to draw the profiles of both summer and winter beaches. Use the information slides to lable the photograph. Answer the GCSE short question. Worksheet task Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

10. A beach profile shows the gradient from the back of the beach to the sea and the characteristics in between. A sandy beach generally has a gentle, fairly flat profile, whereas a pebble beach has a steep, stepped profile. What is a Beach Profile? Information Slide Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

11. Why do beach profiles change? A berm is a terrace on a beach that has formed in the backshore, above the water level at high tide. On broad beaches there may be three or more subparallel berms, each formed under different wave conditions. While an existing berm is moved up the beach by storms and spring tides, a new berm may develop and change the beach profile. Information Slide Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

12. 1. In winter, berms and sometimes sand dunes at the back of the beach, are eroded by destructive waves which drag beach deposits offshore to create an offshore bar . This lowers the height of a beach. Why do beach profiles change? Information Slide Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

13. In late spring and summer, constructive waves will rebuild the beach. The offshore bar is worked by the waves to rebuild the berms. Destructive waves often result in winter profiles that are narrower and steeper. Why do beach profiles change? Information Slide Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

14. Sand Dune A hill of loose sand formed by wind or water, these can be stabilised by vegetation. Key Vocabulary Page 100 Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

15. Produced by Mr M Colclough Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

16. Complete the worksheet describing what a dune slack is and how sand dunes are formed. Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

17. Strong onshore winds blow the sand towards the land. Small embryo dunes form around obstacles in the tideline Vegetation grows on the small dunes to form a large foredune The plants that grow here have long roots that stabilise the sand dunes After a while the vegetation that has died makes the sand more fertile forming the grey dunes. The wind can carve hollows into the dunes known as slacks. How are Sand Dunes Formed? Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

18. Embryo Dune Unstable, steep slip slope (lee face) on sheltered side Crests Gentle slope on windward side Identify the characteristics of sand dunes. Add the characteristics in the correct places. Berm Slack The Characteristics of Sand Dunes Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

19. Study Figure 2, a photograph showing sand dunes near Studland, Dorset. Explain how the sand dunes in Figure 2 formed. (3) SUCCESS CRITERIA: Start from the beginning of the formation process – what does wind cause? What happens to trapped sand? What type of dunes are formed first? What happens to the sand? Where do sand dunes end? What type of dune? Figure 2 Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

20. Study Figure 2, a photograph showing sand dunes near Studland, Dorset. Explain how the sand dunes in Figure 2 formed. (3) MODEL ANSWER: Sand blowing up the beach was trapped by obstacles (1). The trapped sand was colonised by vegetation, forming embryo dunes (1). The embryo dunes grew and migrated inland, forming mature dunes (1). Figure 2 Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.

21. Embryo Dune Unstable, steep slip slope (lee slope) on sheltered side Crests Gentle slope on windward side Berm Slack The Characteristics of Sand Dunes Coastal Features: Beaches LO: To explain the characteristics and formation of beaches.