In a battery, the following two oxidation-reduction reactions are taking place: rxn A: Zn + 2 OH- ? ZnO + H2O + 2e- rxn B: 2 MnO2 + H2O + 2e- ? Mn2O3 + 2 OH- What is undergoing reduction?
A) Zn
B) ZnO
C) MnO2
D) H2O
E) OH-
C
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Paleomagnetic data plotted on a map suggested that the magnetic pole had moved over time; this
phenomenon was called ____________________. Fill in the blank(s) with the appropriate word(s).
Renewable energy includes all of the following except ________
A) the wind B) geothermal heat C) rain D) the sun E) natural gas
Running water is the most effective method of erosion
a. True b. False
________ refers to the agricultural practices in which the members of a farming family produce only enough food for themselves and do not make use of large-scale irrigation, chemical fertilizer, or machinery and technology
A) Subsistence agriculture B) Reduced tillage agriculture C) Advanced organic farming D) Subsidence agriculture E) Intensive traditional agriculture