What radioactive isotope is generally used to fuel a controlled nuclear chain reaction?
A. uranium 235
B. barium 140
C. cesium 137
D. uranium 95
Answer: A
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________ of urban residents in developing countries have satisfactory sanitation services.
A. Less than 10 percent B. Nearly all C. Less than half D. 70-80 percent
The science of genetics was developed based on experimental studies using fruit flies. Indicate whether the statement is true or false
________ is NOT a part of the technology of "clean coal."
A) Removing carbon content from coal before combustion B) Injecting captured carbon dioxide into rock formations deep underground C) Capturing and sequestering carbon emissions D) Removing sulfur oxides from the emissions E) Converting coal to syngas (natural gas)
Which of the components of culture best categorizes language and religion?
A. mentifact B. sociofact C. artifact D. all of these E. none of these