Presently, glaciers cover approximately ________ percent of Earth's land area
A) 3 B) 7 C) 11 D) 15 E) 22
C
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Which carbon sequestration strategy has the highest probability of success?
A. restoring natural forests B. dumping iron powder in the oceans C. converting CO2 to MgCO3 D. injecting CO2 into beneath the ocean floor
Why are plants a good source of potential drug compounds?
A) because there are thousands of different plants with thousands of different chemicals in them B) because natural products are much more effective than synthetic products C) because it is far cheaper to grow chemical compounds in a plant than it is to synthesize them in the laboratory D) all of the above E) none of the above
An electron is the smallest unit of matter that retains the characteristics of an element. Indicate whether the statement is true or false
Outwash is composed of:
a. silt, sand, clay, and boulders b. silt and clay c. silt d. sand and gravel