The dissolved materials in seawater are thought to originate from chemical weathering of rocks on the continents and also from ________
A) meteorites
B) evaporation of fresh water
C) erosion
D) outgassing of elements from Earth's interior
E) organisms
D
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A dry summer and a wet winter are characteristics of a ____ climate
A) Dfc B) tropical wet and dry C) Mediterranean D) marine west coast E) polar
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Indicate whether the statement is true or false
Rip currents are dreaded by surf swimmers everywhere. The standard recommendation for swimmers is if you get caught in a rip current, swim parallel to the shore. Why?
A) This recommendation is wrong; you should swim with the current and wait for it to die away, then swim to shore because the currents dissipate quickly. B) This recommendation is wrong; you should swim toward the shore as fast as you can. C) It will carry you in the longshore current which will take you ashore. D) The current is moving offshore but is confined, so by swimming parallel to shore you can swim out of the current.