P1B 10Coastal Landforms Caused by Erosion

What do topographic maps show regarding coastal features?

• Topographic maps show only the land elevation.

• Topographic maps use symbols to represent coastal features such as sand, rock or coral reefs, rock bare or awash, groups of rocks, exposed wrecks, and depth curves.

• Topographic maps are used exclusively for urban planning.

• Topographic maps do not include any water features.

What are headlands and bays, and how are they formed?

• Headlands are formed by the erosion of soft rocks, while bays are formed by the accumulation of hard rocks.

• Headlands and bays are formed where coasts are composed of alternating sections of hard and soft rocks, with softer rocks eroding faster to form bays and harder rocks remaining as headlands.

• Headlands are always found in tropical regions, while bays are found in polar regions.

• Headlands and bays are formed by volcanic activity along coastlines.

What are stumps in coastal landforms?

• Remnants of eroded sea stacks.

• Large boulders found on beaches.

• Sand dunes formed by wind action.

• Coral reefs that have been exposed.

How do different types of rock affect coastal landform formation?

• Different types of rock have no effect on coastal landforms.

• Different types of rock and their varying resistance to erosion play a significant role in the formation of specific landforms.

• Only soft rocks contribute to coastal landform formation.

• Coastal landforms are only influenced by water currents, not rock types.

What is a wave-cut platform?

• A flat rocky surface created by wave erosion, typically found at the base of receding cliffs.

• A type of underwater volcano formed by tectonic activity.

• A sandy beach area that is eroded by strong currents.

• A geological formation made of sedimentary rocks that rise above sea level.

What role does erosion play in coastal landforms?

• Erosion is a primary force in the creation and evolution of various coastal features.

• Erosion has no significant impact on coastal landforms.

• Erosion only affects inland areas, not coastal regions.

• Erosion is a minor factor in the formation of coastal features.

What are coastal landforms a result of?

• Ongoing processes of erosion and deposition.

• The movement of tectonic plates.

• Volcanic activity in coastal regions.

• Human activities such as construction and mining.

Describe the process of coastal cliff erosion.

• Coastal cliffs are eroded by the sea attacking the base, forming a wave-cut notch. Subaerial weathering weakens the top, causing collapse. The sea removes fallen material, leading to cliff retreat.

• Coastal cliffs are primarily eroded by wind action, which shapes the cliff face and creates overhangs.

• Coastal cliffs remain stable due to the presence of vegetation that protects the soil from erosion.

• Coastal cliffs are eroded by freshwater rivers that flow into the sea, causing undercutting of the cliff base.

How are sea caves, sea arches, and sea stacks related?

• They are all formed by volcanic activity.

• They represent stages in the erosion of headlands: Sea caves form at weak spots, sea arches form when caves connect, and sea stacks form when arches collapse.

• They are all types of coral formations found in tropical waters.

• They are created by the deposition of sediment in coastal areas.