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Coastal Landforms
| Question | Answer |
|---|---|
| Define Dune. | A mound or ridge of sand or other loose sediment formed by the wind. Formed by interaction with the flow of air or water. |
| Define Lagoon. | A stretch of salt water separated from the sea by a low sandbank or coral reef. |
| Define Beach. | A pebbly or sandy shore, esp. by the ocean between high- and low-water marks. |
| Define Estuary. | The tidal mouth of a large river, where the tide meets the stream. |
| Define Cave. | A large underground chamber, typically of natural origin, in a hillside or cliff. |
| Define Arch. | A curved symmetrical structure spanning an opening and typically supporting the weight of a bridge, roof, or wall above it. |
| Define Stack. | A stack is a geological landform consisting of a steep and often vertical column or columns of rock in the sea near a coast, isolated by erosion. |
| Define Stump. | The sea forms a sea cave which goes into a arch then it goes into a stack and finally when the sea eroded for years a stump is formed. |
| Define Headland. | A narrow piece of land that projects from a coastline into the sea. |
| Define Blowhole. | Sea cave erroding by waves and it errods in the roof. Spurts out from the top. |
| Define Tombolo. | A bar of sand or shingle joining an island to the mainland. |
| Define Spit. | A narrow point of land projecting into the sea. |
| Define Wave Refraction. | When a wave changes direction it is called wave refraction. This can be caused by a change in it's speed for any reason, such as coming in contact with a medium that it is unable to pass through. |
| Define Longshore Drift. | The movement of material along a coast by waves that approach at an angle to the shore but recede directly away from it. |
| Define Erosion. | Is a process where rocks and soil are taken away from the coastline due to the actions of wind, rain and waves. (Softer the rock; easier to errode) |
| What are the Coastal landforms that are created by erosion? | Cliffs, Arches, Stacks, Headlands, Caves, Blowholes. |
| Define Deposition. | Is a process where materials are added to the coastline because waves carry sand, seaweed, debris, and salt up onto the shore. |
| What are the coastal landforms that are caused by deposition? | Spits, Beaches, Dunes, Estuaries, Lagoons. |
| Define debris. | Scattered fragments, typically of something wrecked or destroyed |
| Define waves. | Are an important part of both the erosion and deposition process. (link between) There are two different types of waves Constructive and Destructive waves. |
| Define Constructive waves. | Are gentle and deposit waves, materials on the shoreline over time. Strong swash . (weak) Backswash. Builds beach. |
| Define Swash and Back swash. | Swash: is the action of a gentle wave rising up onto the beach. ← (comes in) Backswach: is the action of a wave gently receding back into the ocean. → (goes out) |
| Define Destructive waves. | Are strong and crash against the shoreline cutting away at it. Destroys beach.Destructive waves carry shoreline materials (like rocks, sand and vegetation) back out to sea. |
| Define Scouring. | The action of scouring or the state of being scoured, esp. by swift-flowing water. |
| Define Groynes. | A low wall or sturdy timber barrier built out into the sea from a beach to check erosion and drifting. |
| Types of Coastal management. | Beach Renourishment, Groyne Field, Sea wall, Offshore Breakwater, Purchase Property, |
| Define Dredging. | Dredging is taking sand from under water and putting it elsewhere. |
Created by:
MD33
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