Question

How do waves erode coastlines? Check all that apply.

-Back-and-forth movement loosens sediment and rock.
-Large rocks are picked up and deposited in new areas.
-Continuous impacts loosen sediment and rock.
-Loose sediment is picked up and blown to other locations.
-Sediments scrape against one another and wear away surfaces.

Answer 1

- Back and forth movements that loosens sediments and rock

- Large rocks are picked up and deposited in new areas

- Continuous impacts loosen sediment and rock

- Sediments scrape against one another and wear away

Coastal erosion is a natural process that occurs as the result of sea in the form of waves, tides or currents, striking the shore sediments are washed away and the coastline changes shape as a result. Erosion can happened under any condition but its rate tend to increase when the waves are powerful .

Answer 2

Answer

Waves erode the coastline through;

• Back and forth movements that loosens sediments and rock

• Continuous impacts loosen sediment and rock

• Sediments scrape against one another and wear away

Step-by-step explanation

Coastal erosion occur when waves remove parts of the coastline areas. The erosion happens through corrasion, abrasion, hydraulic action, attrition and corrosion/solution. Corrasion is when waves pick up pebbles and hurl them away. Abrasion happens when breaking waves erode the shore line using sand and large fragments. In attrition process, waves cause rocks and pebbles to collide and break up. Corrosion/solution involves chemical reactions due to weak acid in the sea water.