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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Running water is the most effective method of erosion
a. True b. False
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).
________ 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
Renewable energy includes all of the following except ________
A) the wind B) geothermal heat C) rain D) the sun E) natural gas