Author Question: Without the atmospheric greenhouse effect, the average surface temperature of Earth would be ___. A) ... (Read 103 times)

itsmyluck · **on:** Jul 13, 2018

Without the atmospheric greenhouse effect, the average surface temperature of Earth would be ___.
A) higher than at present
B) lower than at present
C) the same as it is now
D) much more variable than it is now

Question 2

What is the most accurate description of the principle of a lightning rod?
A) The lightning rod acts to discharge the thunderstorm.
B) The lightning rod intercepts the lightning and safely carries the lightning current around the object it protects.
C) Lightning rods have been used since the 1700s, but the principle of their operation is not known.
D) A positive charge induced in the lightning rod repels the negative charge in an approaching step leader.