Icebergs are formed when ___________
a) salty seawater freezes and drifts out to sea
b) ice breaks off from coastal glaciers that reach the sea
c) gigantic pieces of frozen slush are taken out to sea
d) ice floes expand and raft on top of one another
e) large amounts of hail coalesce into a large mass
B
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Which of the following locations best represents the Ekman spiral current?
A) A
B) B
C) C
D) D
The sediments that make up the Ganges river delta in India are often toxic because they
A. Are highly acidic due to acid rain B. Run through toxic soils C. Dissolve naturally-occurring sulfur dioxide D. Originate in coastal industrial areas E. Have concentrations of naturally occurring arsenic
What is an essential characteristic of the scientific method?
A) Uncertainty of the question becomes an absolute certainty after using the method. B) The hypotheses are always testable by careful observation and/or experiment. C) The questions asked are designed to always prove that the hypothesis is incorrect. D) Scientific observations always support the questions asked.
Water circulating at thousands of feet below the surface can be heated to temperatures far above 100°C (212°F) without boiling because the pressure of the overlying groundwater body is so great.
Answer the following statement true (T) or false (F)