What is the range of the angle of repose for most dry, unconsolidated materials (such as dry sand)?
a. 0o ~10o
b. 15o~20o
c. 30 o ~ 37 o
d. 50 o ~ 60 o
Answer: c. 30 o ~ 37 o
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Judge the following sentence according to the criteria given below: Ancient marine phosphate deposits that have been uplifted onto land are extensively mined BECAUSE they are valuable as fertilizers
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.
City A is located on the shoreline of a large body of water. City B is located 100 km inland from the same body of water. In this scenario, which of the following statements is the most likely?
A. City A will have warmer temperatures in summer. B. City B will have colder temperatures in winter. C. The two cities will have similar temperatures only in summer. D. The two cities will have similar temperatures in both summer and winter.
This is the environmental recycling process that supplies essential substances such as carbon, nitrogen, and other nutrients to the biosphere
A) photosynthesis B) evapotranspiration C) photochemical cycles D) biochemical cycles E) ecosystems
In 2002, the Bush Administration changed federal regulations to allow mining companies to dump
hazardous materials into streams and lakes as long as it is considered fill. Indicate whether the statement is true or false.