6. Identify the material that the Twelve Apostles and Ko Ta Pu rock are made from. a. Granite
b. Sandstone c. Limestone d. Marble ANALYSE AND APPLY 7. Explain how and why human activity might contribute to weathering and erosion. 8. Using terms such as uplift , erosion , deposition , weathering and transportation , explain the interconnection between physical processes and the environment. EVALUATE AND COMMUNICATE 9. Predict how Horseshoe bend ( FIGURE3 ) might change over time. 10. Suggest how the landforms will change as a river carves its way from its source to the sea. Answers and sample responses for this topic are available online. LESSON 13.4 Coastal landscapes: the role of erosion and deposition LEARNING INTENTION By the end of this lesson you should be able to explain the impacts of erosion, transportation and deposition of water on a coastal landscape.
Tune in 1. What geological process do you think has caused this sand to be black? 2. How might wave action change this beach?
FIGURE1 The black sands of Reynisfjara, Iceland
13.4.1 How do waves change the environment? The coast is the zone or border between land and ocean. It is the collision zone where the movement of sea water and the impact of the ocean create coastal landscapes. Coastal erosion is mostly caused by wave action. Waves are caused when wind blows over the ocean. The size of the wave depends on wind strength and the distance it travels (referred to as the fetch ) .
TOPIC13 Landforms and landscapes – diversity, significance and management 293
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