Concrete is formed by adding cement and water to a mixture of sand and gravel. This could be seen as an analog for the formation of what type of sedimentary rock?
A. Biochemical
B. Chemical
C. Clastic
Answer C. Clastic
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What is ocean acidification and why is it a threat to marine biodiversity?
What will be an ideal response?
The ________ in California is the boundary between the North American and Pacific plates.
a. Sierra Nevada frontal fault b. San Andreas strike-slip fault c. San Luis Obispo thrust fault d. San Francisco normal fault
The sharp decrease in atmospheric 14C in the past decade is directly related to
A) a drop in global photosynthesis. B) increasing methane levels. C) decreasing temperatures in the troposphere. D) increased use of in fossil fuels.
Where in the cloud is Bergeron process going to be most vigorous?
A. developed areas on land B. developed areas along coasts C. less developed areas on land