Waves
When we stand on the beach and look at the surf and the ocean just beyond, we can see two basic kinds of waves - those produced by local winds, (chop and whitecaps are examples) and swells from winds that are far away.
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Bubbles, Foam and Ocean Spray
Consider bubbles and foam. As Trefil points out, three to four percent of the entire ocean surface at any one time is covered in foam generated by waves breaking out at sea
and along the shore.
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Tides
A favorite time for both locals and visitors to explore the seashore is at low tide when the ocean recedes to reveal the myriad of animals and seaweeds that inhabit the sand and rocks, life that is otherwise hidden from view.
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