Which of the following sedimentary structures indicates sediment transport by density currents (turbidity currents) flowing down the continental slopes?
a. cross bedding
b. current ripple marks
c. graded bedding
d. asymmetrical ripple marks
c
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According to the demographic transition, societies are more quickly willing to adopt measures that reduce death rates than those that reduce birth rates
Indicate whether this statement is true or false.
According to the scientific method, a hypothesis
A) must have already been tested in previous experiments B) must be phrased in highly technical jargon C) must always be understandable to the layperson D) must lead to predictions
At the mouth of the Mississippi River in Louisiana, the loss of coastal wetlands due to human activities contributed to storm damage caused by recent severe hurricanes. This loss of coastal wetlands therefore represents
A) an increase of natural goods. B) a loss of provisioning services. C) a long-term regional benefit to humans. D) a long-term economic benefit to humans.
A major concern with natural gas demand is ________
A) limited use of the fossil fuel B) lack of appropriate storage C) transportation D) low supply E) lack of greenhouse gas emission