Waves arriving at an angle to the shore push water parallel to the shore in a ________.
A. longshore current
B. surf current
C. rip current
D. refraction flow
E. breaker current
Answer: A
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Lakes and reservoirs undergo little vertical mixing because ____.
A. they are too warm B. rain accumulates in a layer of freshwater on the surface C. wind drives primarily horizontal mixing D. plant growth impedes flow E. they contain stratified layers
Which of these karst features is indicative of the most advanced and intense solution of the landscape?
a. sinkholes b. disappearing streams c. swallow holes d. conical hills (haystack hills) e. speleothems
The three most abundant elements in Earth's crust are
A) oxygen, silicon, and aluminum. B) rock, water, and tectonics. C) magnesium, potassium, and oxygen. D) iron, aluminum, and granite.
Winters are coldest in ____ climates
a. humid subtropical b. Mediterranean c. marine west coast d. humid continental, hot summer e. tropical savanna