Anthracite coal ____
A)has up to 75% carbon
B)is actually a metamorphic type rock
C)is the most abundant form of coal
D)is dull-black
E)contains high amounts of volatile elements
B
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Radon typically is elevated in certain regions because of certain types of
A) bedrock B) rainfall C) industrial air pollution D) waste disposal
Integration in numerical forecasting involves
A) predicting conditions in the future, and then using the results to predict even further into the future. B) ensuring fine resolution with close-spaced gridpoints. C) determining the best way to measure initial conditions. D) comparing and combining the forecast results of two or more models. E) all of the above
Sometimes the air is so dry that swirling, rotating wind remains invisible until it reaches the ground and begins to pick up dust, called dust devils
a. True b. False
In the cross section of the front pictured here
A. stratiform clouds tend to form with precipitation being of relatively long duration. B. cumuliform clouds tend to form with precipitation being of relatively long duration. C. cumuliform clouds tend to form with precipitation being relatively short-lived. D. stratiform clouds tend to form with precipitation being relatively short-lived.