▶ Your Answer :
In the given set of information, both the professor
and the reading deal with cause of the Little Ice Age. The reading gives three
pieces of the information to prove its point, whereas the professor refutes
them.
First
and foremost, the speaker indicates that a decrease in the number of sunspots
is not related to solar radiation. In fact, fewer sunspots were observed, but
solar radiation was not decreased in response to them. This counters the
reading passage’s hypothesis that the prevalence of sunspots is dependent on
the amount of energy being emitted by the sun.
Additionally,
according to the performer, a massive volcanic eruption cannot be a reason for
the Little Ice Age. To be specific, cleaning up remains of a volcanic eruption
does not take long. On the other hand, the Little Ice Age lasted for centuries.
This casts doubts on the writer’s assertion that a massive volcanic eruption
brought about the Little Ice Age.
Lastly,
the lecturer says that increase in the Earth’s reflectivity did not cause the
global cooling. This is supported by the fact that ice and snow are not only
things that reflect, but clouds have reflectivity. However, during the global
cooling, the Earth had less could cover, which indicates the Earth did not have
increased reflectivity. This debunks the author’s point that the global cooling
may have occurred due to an increase in the Earth’s reflectivity. |