Listening audioscript

6. HOW IS THE INFORMATION IN THE LECTURE ORGANIZED? 
 
7. LISTEN AGAIN TO PART OF THE PASSAGE. THEN ANSWER THE QUESTION. 
 (Professor) 
 
Today we’re going to talk about the barn owl, also known as the screech 
owl around here for the sound it makes, which many consider…umm… a 
less than pleasant shriek.
WHAT DOES THE PROFESSOR MEAN?
8. ACCORDING TO THE PROFESSOR, WHAT IS TRUE ABOUT THE BARN OWL’S 
SPECIALIZED HEARING? 
9. ACCORDING TO THE PROFESSOR, WHAT IS THE PURPOSE OF THE HEART-
SHAPED FEATHER PATTERN ON THE BARN OWL’S FACE? 
10.ACCORDING TO THE LECTURE, WHAT IS TRUE ABOUT THE BARN OWL’S 
EARS? 
11. WHICH OF THE FOLLOWING ARE ADAPTATIONS THAT HELP THE BARN 
OWL HEAR AND LOCATE PREY? 
SPEAKING 
 
Page 450 
[ mp3 208-209]
 
Question 2.
Now listen to the passage.
(Professor)
For a long time it wasn’t clear to scientists exactly how this layered 
structure came to be. The various theories about it can be classified into 
two general categories. In one category of theories, the core formed first 
and then the lighter layers came later. In the second category of theories, 
all the material clumped together first and then later separated into 
layers. In other words, in the first category of theories the Earth started 
out only as the core, with the lighter layers coming later, and in the 
second category of theories the Earth started out with all of its material 
and later separated into layers. 
These days the issue has pretty much been settled, as the mechanism 
for the layering process has become clear. The earth first started as a 
ball of homogeneous material. Now, as the Earth gained mass, the 
material forming the Earth pressed in, harder and harder, and the inner