Why do waves bend or refract as they approach shorelines?
Waves rarely approach parallel to a shore, and therefore, one portion of a wave will reach wave base before another.
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Who proposed the concept of natural selection?
a. James Hutton b. William Smith c. Charles Darwin d. Abraham Werner e. Alfred Wegener
"Carbon dioxide plays a vital role in dissolving and precipitation of rocks in the formation of karst topography." Evaluate this statement
A) It is false. The statement should read sulfur dioxide, not carbon dioxide. B) It is partially true. Carbon dioxide does form acid to aid in dissolving limestone but has nothing to do with precipitation of rocks. C) It is false. Carbon dioxide does dissolve in water to form acid, but only at the surface where water is exposed to air. D) It is true. Carbon dioxide plays a vital role in these processes.
Volcanic activity located away from plate boundaries is associated with
A) rift zones. B) subduction and melting of plates along collision zones. C) hot spots. D) all of the above.
Which kind of magma has the lowest viscosity?
A. Basalt B. Andesite C. Granite D. Rhyolite