A controversial new technology called ____________________ involves injecting high-pressure fluids into rock formations to extract oil and gas
Fill in the blank(s) with correct word
hydraulic fracturingfracking
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The cooling and warming associated with glacial and interglacial periods has been the result of ____.
A. cyclical changes in the shape of Earth's orbit and the tilt of its axis B. variation in heat produced by the earth's core C. a slow cycle in the brightness of the sun D. changes in greenhouse gas emissions by humans and other animals E. changes in global sea level
Which is an example of an organ system?
A. the compartments that make up the liver and control its function B. lungs taking in oxygen C. the brain, spinal cord, and nerves working together for one purpose D. the lining of the intestine
A large percentage of Muslims living in the United States are from which region?
A) East Asia B) Central Asia C) Southwest Asia D) Southeast Asia E) South Asia
Friction of distance
A) is usually negligible over distances of less than ten miles. B) is dependent in part upon an individual's cognitive distance. C) is now considered an outdated concept with little current utility. D) is another term for the distance-decay function. E) is the reflection of only cost overcoming distance.