Why is erosion by wind more effective in an arid region than in a humid region?
What will be an ideal response?
Answer: In humid areas, moisture binds sediment particles together and vegetation anchors the soil.
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One important lesson we have learned from NAFTA is that:
A. both critics and supporters can effectively argue their perspectives. B. lax environmental laws in Mexico have not been a location consideration of American companies. C. neither party to the agreement has yet profited from increased trade. D. the price of goods produced in Mexico is the same as for good produced in the U.S.
Heat is transferred in Earth’s atmosphere by radiation
a. True b. False
what relates to absolute dating
a. a fossil in upper roach strata is more recently formed than a fossil in lower rock strata b the farther down a fossil is found, the longer ago the organism lived c. a fossil has undergone 2 half lives of a radioactive isotope d. a fossil analyzed with radiometric dating e. age of a fossil is found to be 61.1 million years old f. one fossil is found to be "older: than another fossil
HIV, the retrovirus which causes AIDS, does which of the following?
A) uses reverse transcriptase to synthesize DNA B) uses RNA replicase replicate it own RNA C) both a and b D) neither a nor b