Do not count mispronunciations of difficult proper nouns in the oral reading pas-. sages as errors. You may pronounce these for the children if necessary. Also, do not. count as errors dialectical equivalents (nonstandard dialects); however, these should. be noted.
A galvanic cell is also called a voltaic cell. The spontaneous reactions in it provide the electric energy or current. Two half cells can be put together to form an electrolytic cell, which is used for electrolysis. In this case, electric energy is used to force nonsponaneous chemical reactions.
Galvanic corrosion can only occur when two electrochemically different metals are close to one another and also submerged in an electrolytic liquid (such as salt water). 1  When this occurs, the metals and the electrolyte create a galvanic cell. The cell has the effect of corroding one metal at the expense of the other.