Listening audioscript

part began to reach a high temperature. This, combined with radioactive 
decay, heated the center of the planet until the metals, especially iron, 
began to melt. At this point, the melted iron, being dense and now 
mobile, began to move down. It pooled up at the center and eventually 
formed the iron core of our planet. At the same time, the lightest 

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LPREP IBT 3 E AudioScript 
133
compounds floated to the top of the sphere, eventually becoming the top 
layer, the crust. And so the densest material became the center layer, 
the core, and the least dense material became the outer layer. 
THE READING AND LISTENING PASSAGE DISCUSS THE FORMATION OF THE 
LAYERED STRUCTURE OF THE EARTH. EXPLAIN THE TWO ORIGINAL 
HEORIES AND THE PROCESS THAT IS BELIEVED TO HAVE TAKEN PLACE. 
T
 
Page 451
[ mp3 210-211]
 
Question 3. 
Listen to the conversation.
(Female) 
Hey, Lee, are you going to drive to campus tomorrow for your business 
class? 
(Male) 
Uh, yeah. How come?
(Female) 
Can I catch a ride with you? 
(Male) 
Is your car broken down again? I thought you didn’t have class until one 
o’clock on Tuesday. 
(Female) 
Yes, and yes. I’ll have to wait around, but I’ll just do my reading. But 
anyway, this time my car is absolutely done. My friend’s a mechanic, 
and he says it’s really not worth fixing it this time. Some engine 
problem…I don’t know what. 
(Male) 
So what are you going to do for the rest of the semester? 
(Female) 
I need to make some money to get a new car, so I think I’ll have to drop 
my Friday class and take an extra shift at the restaurant. Maybe a 
weekend lunch, too. 
(Male) 
Naomi, you can’t drop that class. You’re halfway done and you’ll have to 
wait until next spring to retake it. You might not graduate on time. 
(Female) 
I can do it if I take a really heavy load in the spring. 
(Male) 
You’re going to take a bunch of classes and work your last semester?
You’ll be exhausted! Why don’t you take the bus? 
(Female) 
Because it’s like an hour, I have to transfer and walk seven blocks to my 
house, and I’ll be stuck on campus all day on Monday and Wednesday. 
(Male) 
It’s closer to half an hour… 
(Female) 
(interrupting) If it’s on time, which it often is not. 
(Male) 
Well, you can get your work done on Mondays and Wednesdays, and 
walking’s good for you. 
(Female) 
Maybe. I’d rather have a car and not be dependent on the bus, but that 
would mean taking a lot of classes my last semester. If I overdo it and 
fail a class, then you’re right, I won’t graduate on time.