QUESTION TEXT: The author of the passage attributes the belief…
DISCUSSION: This question is asking for the reason people falsely think that glass flows. Lines 1-4 show that glass experts didn’t have this false believe. So it is regular people who have this false belief.
So the right answer probably won’t be too technical. There has to be something in there that regular people could form a misunderstanding about.
Also, only paragraph 1 talks about people’s beliefs. That means the support must come from that paragraph. Any answer mentioning medieval glass or glass manufacturing, for example, is wrong because the author never told us what people think about those things.
Incidentally, I spent an incredible amount of time trying to explain this question. I couldn’t for the life of me see how the right answer was supported by the passage.
Turns out I misread the question. I thought it said “which of the following explains why the myth occurred?”. But actually it’s asking which false assumption people believed about glass. (I got this right timed, then read it wrong when writing the explanation.)
Why am I boring you with this information? Because if it can happen to me, it can happen to you. If you’re totally stuck on question, moving through the answers slowly one by one, you’ve done something wrong. Take a few deep breaths, and reread the question. If it still doesn’t make sense, move on and come back later at the end of the passage if you have time.
- It’s highly unlikely that regular people would create a myth because they thought glass was crystalline rather than amorphous.
In any case, crystals don’t flow. So if people believed this answer then they would also think that glass does not flow.
(Line 17 shows that molten glass has an amorphous structure. That’s what lets it flow!)
- CORRECT. I found this easy to choose from intuition, but hard to explicitly justify with the passage text. Bear with me.
Lines 8-10 show that the persistent belief probably came from a misunderstanding about glasses’s structure. People correctly understand that glass isn’t a crystal structure. However, they misunderstand what this means. Line 4 show that glass’ lack of crystal structure makes people think it flows downward like a viscous liquid.
However, this is wrong. Lines 17-19 show that cooled glass behaves as a solid, even though it has an amorphous structure.
Phew. I don’t think you needed to have all those citations to get this question right. My prephrase of this question in timed conditions was “something something people think glass structure flows, but that’s wrong”
And that worked. It’s very helpful to go through all these citations on review, as it will help your timed work. But don’t think you need to know all this in real time. It took me 5-10 minutes to write the explanation for this question.
- Only paragraph 1 talks about people’s beliefs. We’re never told what people think about medieval glass or glass manufacturing methods.
- The passage doesn’t mention people’s beliefs about transition temperatures, or about medieval glass. For people to have a misapprehension about something, we need to know what they think of it.
- This was a trap answer. It gets things backwards. It says people think that liquid and solid glass are thermodynamically dissimilar.
But actually, people mistakenly believe that liquid and solid glass are thermodynamically similar. That’s why they think solid glass flows downwards: they believe it behaves like a liquid.
The full error in lines 10-14 is this: People see that liquid and solid glass are structurally similar, so they mistakenly think that liquid and solid glass are thermodynamically similar.
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