295720
Description
Flashcards by India Marsh, updated more than 1 year ago
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Created by India Marsh
about 12 years ago
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| Question | Answer |
| What is fetch? | Fetch is the distance of open water a wave travels across. |
| What is swash? | The wave travelling up the beach. |
| What is backwash? | The water that travels back to the sea. |
| Explain longshore drift. | Sand and pebbles are trasported along because the waves sweep them into the beach at an angle and out straight. (This is caused by the wind) |
| What are some features of a constructive wave? (3main points) | Strong swash Weak backwash About 1meter high |
| What are some features of a destructive wave? (3 main points) | Weak swash Strong backwash About 5-6meters high |
| What is mechanical weathering also known as? | Physical weathering/freese thaw weathering. Is caused when there are no chemical reactions |
| Explain chemical weathering. | Here a chemical reaction has taken place eg. acidic rainwater |
| Explain biological weathering. | Weathing involving flora and fauna. For example roots of plants and trees or rabbit burrows. |
| Name the 4 main types of mass movement weathering. | Rockfall Lanslide Mudflow Rotational slip |
| What is hydraulic action? | Trapped air causes explosions in the rock. |
| What is abrasion? | The sand papering effect over rocky surfaces |
| What is attrision? | Rocks are rubbed together and made smaller. |
| What is Corrasian? | Rock is picked up and thrown at the cliffs. |
| What is corrosion? | Cheamicals and minerals in the rock are dissolved |
| Name the four ways of coastal transportation. | Suspension Traction Solution Saltation |
| What is suspension? | Fine sediment is carrried as a suspension in the water making it look muddy or murky. |
| What is solution? | Dissolved material is carried along in solution so you can't see it. |
| What is traction? | Larger pebbles and cobbles are rolled along the sea bed. |
| What is saltation? | Small pebbles are moved when one pebble hits another causing it to bounce. |
| What is a bay? | A curving indentation in the coastline. |
| What is a headland? | An area of highland consisting of resistant rock, jutting into the sea. |
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