As waves pile up water onshore, the water may stream back offshore to create a(n) _______________.
Fill in the blank with correct word.
Question 2Waves approaching a steep coast encounter rocky points called _______________.
Fill in the blank with correct word.
Question 3Waves approaching shore at an angle create a(n) _______________ drift that essentially pushes a river of sand along the shore near the beach.
Fill in the blank with correct word.
Question 4What is NOT a viable long-term solution to reducing the effects of beach erosion?
a. Learn to live with actively eroding beaches, rather than fighting natural processes.
b. Move buildings and roads back from the beach after storms.
c. Remove old dams on rivers feeding sand to the beach.
d. Stabilize sea cliffs, so they dont collapse onto beaches.
e. Move cliff-top houses back from the cliffs to let cliffs erode.
Question 5Why can non-native plantings on dunes be counterproductive in protecting beaches?
a. Non-native plants rarely survive in beach environments.
b. Non-native plants can require artificial watering, leading to a rise in the water table and gully formation.
c. Non-native plants can block the wind from moving the sand to and from the dunes.
d. Non-native plants can overtake the dunes, covering most of the sand, and require frequent cut-back.
e. Non-native plantings can change the soil acidity, making the sand more likely to blow away.
Question 6Why 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 7Which 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.
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