Coastal environments Flashcards
What is coastal erosion?
The process by which coastlines are worn away by natural forces such as waves, currents, and tides.
True or False: Coastal erosion only occurs during storms.
False
What are the main agents of coastal erosion?
Waves, currents, tides, and wind.
Fill in the blank: The movement of sediment along the coast is known as __________.
longshore drift
What is transportation in the context of coastal processes?
The movement of sediments from one location to another along the coastline.
Multiple Choice: Which of the following is NOT a type of coastal erosion? A) Hydraulic action B) Abrasion C) Sedimentation D) Attrition
C) Sedimentation
What role do waves play in coastal processes?
Waves contribute to both erosion and the transportation of sediments along the coast.
True or False: Coastal deposition occurs when sediments are dropped off in a new location.
True
What is the term for the gradual sinking of land near coastlines?
Subsidience
Fill in the blank: The area where land meets the ocean is called the __________.
coast
Multiple Choice: Which process involves the wearing away of rocks and cliffs? A) Transportation B) Erosion C) Deposition D) Sedimentation
B) Erosion
What is a coastal landform created by deposition?
Beach, spit, or delta.
True or False: Tides have no effect on coastal processes.
False
What is the primary effect of human activity on coastal erosion?
Human activities like construction and deforestation can accelerate erosion.
Fill in the blank: __________ is the process by which smaller particles are worn down and carried away by water.
Erosion
What is a groin and its purpose?
A groin is a structure built out into the water to interrupt water flow and limit erosion.
Multiple Choice: Which of the following best describes longshore drift? A) Movement of water B) Movement of sediments C) Erosion of cliffs D) Formation of beaches
B) Movement of sediments
What is the effect of sea level rise on coastal environments?
It can lead to increased erosion and loss of habitat.
True or False: Beaches are formed exclusively by erosion.
False
What is the primary source of energy driving coastal processes?
Wind and waves.
Fill in the blank: __________ refers to the accumulation of sediment in coastal areas.
Deposition
What is hydraulic action?
The force of water waves compressing air in cracks of coastal rocks, leading to erosion.
Multiple Choice: Which of the following is a factor that influences coastal erosion? A) Climate B) Vegetation C) Human activity D) All of the above
D) All of the above
What is the difference between erosion and weathering?
Erosion involves the removal of material, while weathering is the breaking down of rocks in place.
True or False: Coastal processes can be completely controlled by humans.
False
What is beach nourishment?
The process of adding sand or sediment to a beach to combat erosion.
