Coastal Sediment Transport Concepts

The video explores various agents of erosion, focusing on wind, water, and glaciers. It explains how these agents transport and deposit sediments, leading to features like sand dunes, deltas, and graded bedding. The video also covers glacial features such as drumlins and kettle lakes, and discusses wave erosion and longshore drift, highlighting human interventions like jetties and breakwaters to manage erosion.

What is the primary agent responsible for transporting fine sand grains on a beach?

• Wind

• Water currents

• Tidal waves

• Human activity

How are sediments typically sorted when transported by wind?

• By color

• By shape

• By size

• By weight

What is the term used to describe the sorting of sediments from large to small as a stream slows down?

• Vertical sorting

• Graded bedding

• Horizontal sorting

• Random sorting

In calm waters, what is the process called when sediments are deposited in layers over time?

• Horizontal sorting

• Graded bedding

• Vertical sorting

• Erosion

What type of sediment is typically found in glacial till?

• Only fine sand

• Unsorted sediment

• Well-sorted sediment

• Only large boulders

What is a kettle lake?

• A lake formed by river erosion

• A lake formed by a melted chunk of glacial ice

• A lake formed by a meteor impact

• A lake formed by volcanic activity

What is the primary purpose of jetties in coastal areas?

• To increase wave energy

• To enhance fish habitats

• To prevent sediment deposition

• To slow down water and reduce erosion

What is the effect of longshore drift on coastal sediments?

• It prevents sediment movement

• It erodes sediments in a straight line

• It deposits sediments in a zigzag pattern

• It only affects large boulders

Which feature is NOT typically associated with glacial activity?

• Erratics

• Drumlins

• Kettle lakes

• Deltas

What is the main reason for the sandy beaches on the south shore of Long Island?

• Wind erosion

• Glacial melting and sediment transport

• River deposition

• Volcanic activity