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Other islands along continents are formed by the action of sand and dunes. On
the east and gulf coasts of the United States, where the continental shelf is large,
wave action readily forms sand. This sand can build as a large bar offshore, ...
Sand crabs burrowing in the moist sand serve as prey to many species of shore
birds. Ghost crabs scurry about on the dry sand, finding that a nocturnal,
scavenging lifestyle on the darkened beaches suits their shy natures. Dwelling
on the ...
Females make the long march up the beach to lay eggs in a nest dug in the sand.
Using her flipperlike forelimbs, which have been modified for sea life, the female
pulls herself up the beach and digs the nest three feet into the cool moist sand.
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I purchased all three books in this set and taught a short course to a small group of high school kids. We had a great time with this course! We did 10 experiments and held very intense all-day ... Read full review