The main idea of both the passage and the lecture is about the reasons for a mass-extinction event that happened at the end of the Triassic period. The author proposes three reasons and causes for extinction. The lecturer, on the contrary, refutes all three responses for the event and mentions that these are not good explanations for the happening.
To begin with, the reading claims the declining sea-level destroy habitats and lead to the mass-extinction. However, the listening asserts fluctuating and go down of sea level is quite gradual and happens in several million years, for extinction it needs to be sudden, also the populations that live in coastal and shallows are adoptive; therefore, it is not a good reason.
In addition, the text states that climate cooling because of volcanoes which released SO2 is another probability. Conversely, the talk makes an argument that there is no evidence for being SO2 in that climate because SO2 comes back with rain and the climate still has to present it but the atmosphere is clear out of that.
Lastly, the article argues that asteroid strike blocks sunlight and die many animal species. On the other hand, the lecture discusses, very few scientists accept the idea of the strike, because they find asteroid crater with a different date from extinction, actually, it is 12 million before the time expecting. As a result, the lecturer concludes this explanation has a problem too.
The main
idea
of both the passage and the lecture is about the reasons for a mass-extinction
event
that happened at the
end
of the Triassic period. The author proposes three reasons and causes for extinction.
The
lecturer,
on the contrary
, refutes all three responses for the
event
and mentions that these are not
good
explanations for the happening.
To
begin
with, the reading claims the declining sea-level
destroy
habitats and lead to the mass-extinction.
However
, the listening asserts fluctuating and go down of sea level is quite gradual and happens in several million years, for extinction it needs to be sudden,
also
the populations that
live
in coastal and shallows are adoptive;
therefore
, it is not a
good
reason.
In addition
, the text states that climate cooling
because
of volcanoes which released SO2 is another probability.
Conversely
, the talk
makes
an argument that there is no evidence for being SO2 in that climate
because
SO2
comes
back with rain and the climate
still
has to
present it
but
the atmosphere is
clear
out of that.
Lastly
, the article argues that asteroid strike blocks sunlight and
die
many
animal species.
On the other hand
, the lecture discusses,
very
few scientists accept the
idea
of the strike,
because
they find asteroid crater with a
different
date from extinction, actually, it is 12 million
before
the time expecting.
As a result
, the lecturer concludes this explanation has a problem too.