A Moment of Science
Most grains of sand originally started as part of a larger rock.
Why don't lakes have tides as well? To answer this question, we need first to explore what causes ocean tides.
Your five-year-old knows when it comes to building sand castles at the beach, wet sand is much better than dry. If you fill your bucket with dry sand and turn it over, you’re likely to end up with a tumbled ruin, not a proud tower or turret. Any junior civil engineer will tell you to use damp sand from the water’s edge to construct proper parapets. Learn more on this Moment of Science.
Anyone who loves the beach can tell you about the distinctive sound of the ocean hitting the sand: Woooosh. Learn more on this Moment of Science.
Why is it always breezy at the beach? Find out on this Moment of Science.
For those lucky enough to live on either coast, going to the beach and frolicking in the ocean waves is a favorite summertime activity. Faced with the reality of an oceanless existence, inhabitants of the landlocked, flyover states came up with the ultimate substitute: the wave pool.
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