COASTAL SYSTEMS

Waves in the Atlantic tend to be smaller than those in the Pacific.  Why?

• The Pacific Ocean is shallower

• The Pacific Ocean is wider

• The Atlantic Ocean has slower winds

• 
  Winds blow longer in the Atlantic Ocean

If a wave has a length of 20 feet, what is the depth?

• 20 feet

• 15 feet

• 10 feet

• 5 feet

As you go deeper in a wave, what happens to wave action?

• in increases

• 
  it decreases

• 
  it stays the same

On a tectonically passive continental margin, the continental shelf is narrow.

• true

• false

The energy in water waves gets transferred to the land when which happens?

• 
  waves drag on the seafloor

• waves break onto the shore

• waves stir up sediment on the continental shelf

The wave depth can be measured as (mark all that are correct):

• distance from crest to crest

• distance from trough to trough

• distance from crest to trough

• 1/2 wavelength

Which is true about the intertidal zone?

• 
  it is exposed at high tide

• it is the part of the continental shelf where waves are found

• it is found landward of the dunes

• 
  it is exposed at low tide

The wavelength can be measured as (mark all that are correct):

• distance from crest to crest

• distance from trough to trough

• distance from crest to trough

• 1/2 wave depth

The sand on the beach comes from which source?

• from adjacent beaches

• 
  pushed up from deep ocean by waves

• 
  further up slope on the continent

• it forms in place at the beach

If a wave has a length of 30 feet, what is the depth?

• 20 feet

• 15 feet

• 10 feet

• 5 feet