Listening audioscript

THE STUDENTS DISCUSS TWO POSSIBLE SOLUTIONS TO THE WOMAN’S 
PROBLEM. BRIEFLY SUMMARIZE THE PROBLEM. THEN STATE WHICH 
OF THE TWO SOLUTIONS YOU THINK IS BETTER AND WHY. 
 
Question 6, Page 317
[ mp3 145-146]
Listen to part of a lecture in an astronomy class. 
(Professor)
For a long time, the idea prevailed, that in order for life to exist on a 
planet, the planet had to be in what is called the habitable zone. This is a 
region capable of supporting life and certain conditions have to exist for 
that to happen. The planet has to be at the right distance from its parent 
star, which produces the planet’s heat and light. The planet cannot be 
too close to its star and therefore, too hot. And, on the other hand, it 
cannot be too far away and, so too cold for liquid water to exist. Of 
course, liquid water is essential for life on Earth and it was thought that it 
would probably have to be true for life on other planets as well. But, 

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LPREP IBT 3 E AudioScript 
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recent discoveries on the moons of the planets Jupiter and Saturn have 
revealed some other environments, well outside the habitable zone, that 
could be suitable for life. 
So, OK, one of Jupiter’s moons, Europa, appears to be a ball of frozen 
water; far too cold for liquid water to exist. However, it turns out that 
Europa is close enough to the massive planet Jupiter that Jupiter’s 
gravitational forces pull on the moon as it orbits; creating what is called 
tidal friction. Now all of this grinding heats up the interior of the moon to 
the point where scientists now believe that, under the icy surface of 
Europa, there is a liquid water ocean. This ocean is heated from below 
and might create the necessary conditions for uh life to exist.
Another possibility is present on Saturn’s moon, Titan. Now when you 
see pictures of the surface of Titan, you can see lakes, clouds, and rain, 
but the rain is not composed of water. The lakes, clouds, and rain are 
formed from methane, which is the only liquid that can form on the 
surface of Titan because it’s so cold. Now, this has scientists thinking 
that maybe a different organic liquid could perform the same function on 
another planet as water does on our planet. This could mean that there 
could be a form of life that is made up of chemicals that are completely 
different from what we now know. It is possible that this life may have 
arisen on some cold planet or moon in liquid methane or other organic 
liquids instead of water.