Nacreous clouds are commonly described as ____________________ clouds.
Fill in the blank with correct word.
ANSWER: mother-of-pearl
mother of pearl?
polar stratospheric
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What other factors might explain diff erences in the amount of water that
states use, aside from population and area? What will be an ideal response?
Describe the distribution of oxygen in the ocean from the surface to the deep sea
The impact of global warming on the water cycle is expected to produce
A) more precipitation. B) fewer droughts. C) fewer and less severe hurricanes. D) greater agricultural productivity in currently water-stressed regions.
Suppose the temperature at night is going to drop to -5°C, and a fairly stiff wind is predicted. Assuming that cost is not a factor, which of the following methods is probably the best way to protect an orchard against a hard freeze?
A. Use helicopters. B. Use wind machines. C. Put orchard heaters to work. D. Sprinkle the crops with water.