Why are many permanent lakes in deserts saline?
A. They have low rates of evaporation.
B. They are fed by constant exotic streams.
C. They are located in basins of interior drainage.
D. They are fed by permanent springs.
E. They have low water capacity.
C
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Classify the following properties as physical or chemical.Conducts electricity.
Fill in the blank(s) with the appropriate word(s).
To determine the radiometric age of a rock, scientists must be able to measure very accurately the:a
unstable parent element. b. unstable daughter element. c. stable parent element. d. stable daughter element. e. unstable parent element and stable daughter element
All other variables equal, humid air is less dense than drier air because:
A) water molecules are negatively charged and thus repel other molecules. B) the molecular weight of water is less than that of either diatomic oxygen or diatomic nitrogen. C) some of the water in humid air will condense, and the latent heat released will expand the air. D) water molecules have a lower average velocity than does diatomic nitrogen.
Condensation is a phase change from _______ to _______, which _______ the surrounding air.
A) liquid; gas; warms B) liquid; gas; cools C) gas; liquid; warms D) gas; liquid; cools E) gas; liquid; neither warms nor cools