Author Question: Why does removing driftwood from a beach endanger the sea cliffs behind it? a. Waves cannot get ... (Read 67 times)

cherise1989 · **on:** Jul 13, 2018

Why does removing driftwood from a beach endanger the sea cliffs behind it?
a. Waves cannot get over the driftwood to get to the sea cliffs.
b. Waves have to be higher to reach over the driftwood to reach the sea cliffs.
c. Wave energy is reduced when waves move the driftwood.
d. Driftwood bouncing up and down on the beach pounds the sand grains together, making them more difficult to erode.
e. Driftwood breaks up the direct forward thrust of the waves, making them more erratic.

Question 2

Which piece of evidence does NOT indicate that a barrier island has migrated landward?
a. A lighthouse that was built onshore is now well offshore.
b. Oyster shells that grew in the sheltered lagoon behind the barrier island are now found on the front beach.
c. Stumps of trees that grew along the lagoon are now found on the front beach.
d. Barrier island beaches are now more easily eroded than they were one hundred years ago.
e. Fine-grained lagoon sediments are layered beneath the sands of the barrier island.