Which of the following is not true of hard water?
A) It increases the permeability of rocks.
B) It may add toxic metals to drinking water.
C) It may clog pipes.
D) It decreases the effectiveness of soaps.
Answer: D
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To say that evaporation is a cooling process that the
A. water left behind cools. B. surrounding air cools.
Tsunamis can be detected on the open ocean through
A) measurement of changes in pressure exerted on the sea bottom by the water column B) shipboard observations of wave heights C) seismometer records D) measurement of wave speeds with Doppler radar
____________________ stratus clouds are considered middle-level clouds
Fill in the blank(s) with correct word
Seasonal fluctuations in CO2 emissions reflect
A) seasonal changes in vegetation cover in the higher latitudes of the Northern Hemisphere. B) summer melting in the tundra. C) increased fuel use for home and building heat in winter months. D) geothermal activity, which is highest in the fall.