What fact makes radiocarbon dating possible? What will be an ideal response?
ANS:Life
forms stop accumulating carbon 14 when they die.
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Three-fourths of federal public land set aside for public use, resources extraction, enjoyment and wilderness habitat can be found in
A. California B. Oregon C. West Virginia D. North Dakota E. Alaska
Which of the following forms of air pollution is most directly linked to increased incidence of asthma and bronchitis?
a. Ozone b. VOCs c. Radon d. SPMs e. sulfur dioxide
The next frontier in resource extraction in the region may be
A) oil-tar sands B) deep -sea mining C) the generation of electricity from tidal currents D) hydraulic fracking E) wind turbines erected on platforms erected in deep oceanic waters
Which of the following statements about water is true?
A) At temperatures above 4°C, warmer water will rise. B) At temperatures above 4°C, warmer water will sink. C) At temperatures between 0°C and 4°C, warmer water will rise. D) At temperatures below 0°C, warmer water will sink.