Frozen precipitation that has concentric accreted shells is termed ____________________
Fill in the blank(s) with correct word
hail
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Compared to the use of fossil fuels for generating electricity, wind energy ________
A) produces no exhaust pollutants and contributes little to global climate change B) is more widely used in the United States C) is less renewable D) requires very little investment E) is more consistent
This figure shows the geologic timescale. Which period listed below would be part of the Paleozoic?
A) Neogene
B) Paleogene
C) Jurassic
D) Triassic
E) Cambrian
When an amine reacts with an anhydride to produce an amide, what else is formed?
A) an alcohol B) a carboxylic acid C) water D) No other compound, the amide is the only product.
Which of the following is not true of chlorofluorocarbons?
A. CFCs role in depleting ozone has yet to be confirmed. B. They are used to make foam products. C. They have been used as propellants in spray cans. D. CFCs are stable under conditions at Earth's surface. E. They are used in refrigeration systems.