A rock that is 20 million years old comes from the ________ Epoch
A) Miocene
B) Cretaceous
C) Jurassic
D) Paleocene
Answer: A
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The deepest oceanic trenches are in which ocean?
A) Atlantic B) Pacific C) Arctic D) Indian E) In the Atlantic, Pacific, Artic or Indian, the trenches are approximately the same depth.
Despite their idyllic island appearances, atolls pose many natural hazards to human habitation.What are three factors that make human habitation on atolls difficult?
What kind of streamflow is present in this image?
A) Braided flow B) Laminar flow C) Turbulent flow D) Overland flow
Trace elements in seawater are ________.
A. found in concentrations suitable for commercial use B. significant components of the total salt content of seawater C. necessary for many marine life forms D. in higher concentrations at lower salinities E. toxic to marine life forms