Which of the following is an application of the principle of constant proportions?
A) Calcium carbonate dissolves at an increasing rate with increasing depth until the calcite compensation depth is reached.
B) Increasing pressure increases the number of water molecules in a given volume and inhibits the number of ice crystals.
C) Siliceous ooze accumulates on the ocean floor as it is being dissolved because it accumulates siliceous tests faster than seawater can dissolve them.
D) The concentration of a single major constituent can be measured to determine the total salinity of a water sample.
D
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What is one challenge that organisms living in very hot environments face?
A. Their DNA may leave the nucleus. B. Their chromosomes may stick together. C. Their DNA may be affected by many mutations. D. The two strands of their DNA may separate.
The scientific spirit is based upon
A) hypotheses of well-known philosophers. B) honesty and trust. C) consensus in the scientific community. D) experimentation.
There is a significant income gap between China's coastal provinces and its inland areas
Indicate whether the statement is true or false.
A water surplus occurs when
A) the potential evapotranspiration demand cannot be satisfied by precipitation inputs. B) the additional inputs of water into a system are not enough to satisfy potential evapotranspiration. C) potential evapotranspiration is greater than soil moisture. D) additional water exists after potential evapotranspiration is satisfied by precipitation inputs. E) all available surface water has evaporated.