Sound travels ____________________ in warm air than in cold air.?
Fill in the blank with correct word
ANSWER: faster?
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All the following statements about the concept of diffusion and about cultural phenomena are true EXCEPT:
A) Diffusion explains the distribution of all cultural phenomena. B) Sometimes the same phenomenon does occur spontaneously and independently at two or more places. C) We should never assume that any aspect of culture has diffused unless we can demonstrate the path of diffusion from one culture to another. D) Independent invention of different kinds of innovations, such as the use of the zero as the basis of a numerical place system, has occurred in human history. E) Diffusionist arguments have been used to minimize or underestimate the ingenuity of various peoples.
The primary aim of the Clean Air Acts is to ____.
A. set standards for pollution levels B. require screening of new products for safety and setting standards C. encourage resource conservation D. set aside or protect certain species, resources, and ecosystems E. require evaluation of the environmental impact of an activity proposed by a federal agency
Overgrazing is a significant cause of degradation of grassland in the United States. Why is overgrazing so devastating to grassland? Why would the people who control grazing allow overgrazing to happen, given what we know about the problems associated with it?
What will be an ideal response?
Some of the world's deserts are the result of the rain shadow effect of mountain ranges.
Answer the following statement true (T) or false (F)