Which rock type is most likely to have been deposited in a high-energy environment (such as a very turbulent stream)?
A) conglomerate
B) shale
C) chert
D) microcrystalline limestone
Answer: A
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Figure 11.4b shows the surface pressure conditions on October 18, 2007. Using a red pencil, draw at least two arrows to show the directions of winds flowing from the high-pressure center over Idaho and Nevada into the low-pressure center off of the Pacific Northwest, and draw two more arrows showing the directions of winds flowing from the same high-pressure center into the low-pressure center over Iowa. Remember that surface winds flow at a 45° angle to the pressure gradient. Draw at least two red arrows to show wind flowing out of the high-pressure center off the east coast toward the low-pressure center over Iowa. Using an orange pencil, shade at least two regions with closely spaced isobars, indicating a steep pressure gradient. Using a green pencil, shade at least two regions with
widely spaced isobars. What will be an ideal response?
Forests gave way to grasslands and prairies following a general decrease in precipitation 25
million years ago. Indicate whether the statement is true or false.
When we compare urban blight in developed and developing countries, we typically find
A) increasing population densities in both types of countries. B) decreasing population densities in both types of countries. C) increasing population densities in developed countries but declining population densities in developing countries. D) decreasing population densities in developed countries but increasing population densities in developing countries.
Ozone, PAN, and small amounts of other oxidating pollutants are the ingredients of photochemical smog and grouped under a single heading called ____
a. NOx compounds b. volatile organic compounds c. hydrocarbons d. radicals e. photochemical oxidants