If Uranium-234 decays via alpha emission, what is the likely product of radioactive decay? (U, atomic no. = 92)
A. 
Th
B. 
Th
C. 
Np
D. 
Np
E. none of the above
Answer: A
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The energy possessed by animals ultimately comes from
A. concentrations of thermal energy. B. the environment. C. within. D. the Sun.
Instead of only generating more electricity, rising energy demands may also be met by
A) switching from natural gas to coal. B) switching from coal and natural gas to windmills and solar technologies. C) increasing the efficiency of energy consumption. D) using more nuclear power instead of fossil fuels.
The Modern Era's views on the relationship of humans and the environment can be described as ________
A) opportunities for fewer connections between humans and nature B) human impacts on ecosystems differ significantly from natural disturbances C) reconciliation of our activities with the inescapable laws of the natural world D) evolutionary change that described the connections between organisms and their environment E) the obsession with material goods that broke the connection between humans and nature
Why are many contaminants found at higher concentrations in polar bears and people living in Greenland than they are in bears and people living in temperate and tropical areas?
A) Most of Greenland's GDP comes from importing toxic chemicals for disposal deep beneath its ice sheets. B) The ice sheets in Greenland, which provide both people and polar bears with fresh water, were contaminated as a result of the Chernobyl nuclear accident. C) Polar bears and people living in Greenland eat penguins, which are naturally high in toxic contaminants. D) Global atmospheric circulation carries airborne toxins toward the poles, where their deposition exceeds evaporation. E) There are fewer regulations regarding the release of toxic pollutants in Greenland than in other regions of the world.