SDSU Oceanography100 (Exam 3) Questions And Answers 100% Verified

SDSU Oceanography100 (Exam 3) Questions And Answers 100% Verified What are the parts of a coastal region? - answerCoast, offshore, beach, berm, notch, wave- cut platform What does wave energy do to a coastal cliff over time? - answerWave Energy erodes the cliff, eventually creating sea stacks, caves and arches What do rivers and cliff erosion have to do with sand to the berm? - answerRivers: some carry more sediment to the ocean than longshore currents Cliff Erosion: sediments erode to join the berm How is the sand supply in Southern California? - answerBecause of seawalls, the production of sand is decreasing What is the principle source of sand supply in Southern California? - answerThe soft-rock cliffs What is the significance of the berm? - answerThe berm is where the eroded sediments are, and they are now moving with the ocean Wintertime vs Summertime Beaches - answerWintertime: larger, high energy waves scour sand from the berm Summertime: lower energy waves move sand up the beach face, toward the berm Definition: Longshore current - answerThe zigzag movement of water along the shore, parallel to the coast Definition: Longshore drift - answerThe movement of sediment in a zigzag fashion caused by the longshore current Why are there longshore currents and longshore drifts? - answerThe waves approach the beach at an angle Which direction does the current push the sand in terms of longshore current? - answerDown-coast in a zigzag motion; South Which direction does sand move in Southern California in terms of longshore current? - answerFrom North to South