exam 3 Oceanography 100 SDSU Questions and Answers

exam 3 Oceanography 100 SDSU Questions and Answers The Coastal region - CORRECT ANSWER-the parts of the coastal region, starting with the coast all the way to the offshore Offshore - CORRECT ANSWER-extends from breakers to edge of continental shelf Beach - CORRECT ANSWER-shore plus nearshore; very active Berm - CORRECT ANSWER-dry area at the foot of the coastal cliff - sand This may be flooded during high tides, tsunamis, and storm surges Wave-cut platform - CORRECT ANSWER-flat eroded bedrock at beach by wave energy Coast - CORRECT ANSWER-land extending inland as far as marine influence is seen; the land of the continent adjacent to the beach; Marine influence ex: fog, vegetation, etc. Notch - CORRECT ANSWER-cave cut into the sea cliff by wave energy What wave energy does to a coastal cliff over time - erosion, how? - CORRECT ANSWER-Wave energy erodes the coastal cliff over time. Waves erode sediments from cliffs and shorelines. The sediment in ocean water acts like sandpaper. Over time, they erode the shore. The bigger the waves are and the more sediment they carry, the more erosion they cause. sources of sand to the beach - CORRECT ANSWER-Rivers and cliff erosion are the sources of sand to the beach what about southern California sand supply? What's the principal source?... - CORRECT ANSWER-Southern California's principal source of sand supply comes from the erosion of sea cliffs/bluffs Coastline is below. Coast is on top (above) What's the significance of the berm? - CORRECT ANSWER-Berm: A nearly horizontal plateau on the beach face or backshore, formed by the deposition of beach material by wave action; dry area at the foot of the coastal cliff - sand The winter time beach vs the summer time beach, why the differences? - CORRECT ANSWER-These are a function of wave energy that comes at different seasons Summer: beaches are very sandy, low wave energy, wide berm Winter: beaches are rocky, high wave energy, narrow berm