Which of the following accurately describes 18O/16O ratios of ice sheets?
A) During warmer periods, 18O evaporates more readily and therefore the 18O/16O ratio is higher.
B) The higher the ratio of ice core 18O/16O, the cooler there temperatures because the 18O will be locked up in ice sheets.
C) During periods of colder temperature, the 18O/16O ratio is higher because only the 18O isotope is being evaporated.
D) During warmer periods, 16O evaporates more readily and therefore the 18O/16O ratio is significantly lower than colder periods.
A
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The urban heat island steepens the environmental lapse rate, creating unstable conditions by
A) greatly heating the ground surface with less heating further up in the atmosphere. B) greatly heating the ground surface and greatly heating the atmosphere further up. C) greatly cooling the ground surface with great heating further up in the atmosphere. D) greatly cooling the ground surface and greatly heating the atmosphere further up.
The White Nile River loses nearly half its water as it flows through
A. Khartoum B. The Nubian Desert C. The Sudd D. The Delta
Hydroelectricity is an important renewable source for commercial power, producing about ________ percent of global commercial energy
A) 6 B) 10 C) 18 D) 27 E) 43
List two problems scientists encounter as they attempt to divide the Earth into climatic zones
What will be an ideal response?