The overall specific gravity of the earth is much higher than the specific gravity of crustal rocks which means the earth is about twice as heavy as the rocks on the surface would suggest. Iron meteorites are thought to have the same composition as the average earth, and the meteorites contain a lot more iron than the Earth's surface rocks.
The barrier islands shelter and protect the mainland from the powerful forces of wind, waves, tides, currents and the ravages of storms and hurricanes. They shelter the estuaries that form behind the barriers.
Barrier islands form as waves repeatedly deposit sediment parallel to the shoreline. As wind and waves shift in keeping with weather styles and neighborhood geographic features, those islands constantly pass, erode, and grow. They can even disappear entirely.
Key Biscayne is a barrier island found at the bottom give up of a sequence of islands that stretches alongside the southeastern coast of Florida. Barrier islands are construct-united states of sand that shape alongside the coast of larger land bodies.
Barrier islands are critically crucial in mitigating ocean swells and different hurricane events for the water systems at the mainland aspect of the barrier island, in addition to defensive the coastline. This efficaciously creates a unique environment of exceedingly low strength, brackish water.
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Explanation:
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Answer:
Dense water sinks below less dense water. This is the principle that drives the deep ocean currents that circulate around the world. A combination of high salinity and low temperature near the surface makes seawater dense enough to sink into the deep ocean and flow along the bottom of the basins.
The change is due to the motion of the Earth in its orbit around the sun
