- [Instructor] We are
looking at question 38 here, which comes at the end of
this big, long paragraph and asks where sentence
four should be placed. Should it be where it is
now after sentence one, sentence two or sentence five? This question requires
us to really understand the whole paragraph. And I'll read the whole
thing in just a minute but let's talk about what
kinda question this is first. Because of what it's asking us to do, I can tell that this is a
sequencing sentences question. You're going to see one to two of these on your official SAT. Questions like these ask you to look at a paragraph as a whole and evaluate the flow of ideas within it. When I go back to the passage I'm gonna look for a few things. Does the paragraph go
in chronological order? That is to say, does the
order in which events unfold make logical sense? Or are ideas explained
before they're introduced? A good way to check for that is to identify unclear pronouns. Pronouns that don't clearly
refer to an antecedent or a noun that comes before it. If the passage says she, for example, we need to know who that she is. And I'm gonna look for
transition words and phrases as a way to identify sentences that need to
be next to one another. We might wanna look for sentences that are linked by cause
and effect relationships or transition words that
express contrasts or continuity like however or therefore. So that's our strategy. I'm gonna be looking for
a weird order of events, unclear pronouns and sentences that need
to be next to each other. Let's go back to the passage. Let me read the passage
so we can get some context And as we go, I'm gonna circle pronouns and any kind of transition
words or phrases. Under certain circumstances when lightning strikes sand or rock, evidence of the strike is left behind in the form of a fulgurite, sometimes called petrified lightning. Now, if you're reading a paragraph on the writing and language test and you see numbers like these, they indicate that there's going to be a sentence sequences question coming up, so you can start looking
sharp for sequencing issues. First discovered in 1706, these formations are
found in two varieties, sand fulgurites and the much
less common rock fulgurites. As it cools, the silicone lining
forms a glass walled cavity that may look like a plant's root system. Sand that adhered to the
molten silica as it solidified forms a casing around the
fragile glassy structure. Sand fulgurites form when the intense energy
of a lightning bolt rapidly heats moist air
trapped in sandy soil and the resulting explosive
expansion creates a void lined with melted silica. Rock fulgurites found almost exclusively on the peaks of mountains, appear as a thin glassy crust
on the surface of a rock or along fractures within them. Okay, so a strategy I'm going
to use in order to save time is to not test each answer in context. I'm going to make a prediction about where sentence four ought to go. So let's through these pronouns. Okay, so we have these
formations in sentence one but that refers to fulgurites
in the previous sentence in the previous paragraph. So that's all right. Let's talk about, as it cools, what does it refer to? Okay, so it refers to the silica lining. So we don't have a pronoun mismatch there but it does expose something weird. What's the silica lining, right? This feels like something
I talked about earlier, the weirdness of describing something before it's been
introduced in the passage. Sentence one doesn't talk about silica linings cool or otherwise but sentence four, our
target sentence does, Right, it refers to silica melting as a result of a lightning strike. So if we were going to
reconstruct the order of events, we'd say that a lightning
strike happens first, heats up the sand, so
plus, plus, plus to heat and then melt some of it
and then it cools down and solidifies into glass,
minus, minus, minus getting cold. So that's what I'm gonna say in order to preserve the
logical order of events, the lightning strike makes the sand hot and then it cools into glass. So I'm going to predict that sentence four should be placed after sentence one. So right here. And is that a choice? Yes it is, choice B. We can also see that most of the other
sentences in the paragraph are about sand fulgurites
until sentence five, which transitions to a
discussion of the other kind, rock fulgurites. So that also plays into the
logical sequence of events, Sentence one introduces the two varieties of fulgurite sand and rock then you have a few sentences
about sand fulgurites followed by one sentence about
the much rarer rock kind. Let's take a little bit more time time to prove to you that I
have the right answer even though I wouldn't
do this on test day. So let's look at choice A. If I leave sentence four
where it is right now then that sequence with
the melted silica cooling before it becomes melted stays in place. So that's not good,
let's knock out choice A. Choice B, we'll skip because
that's the right answer we've already talked about that. Choice C, if we put sentence
four after sentence two, so here, it still describes
cooling silica out of order before the heating is introduced. And it also interrupts this relationship between glass walled cavity and the fragile glassy structure
in sentences two and three. So we can cross that off too. Choice D, after sentence five here, introduces sand fulgurites after the rest of the paragraph is done talking about the sand kind and has moved on to the rock kind, so that's not logical either. You can see the strategies that I modeled in this worked example. I was looking for unclear pronouns and transition words or phrases because that can help me identify if there's a weird order of sentences, if the sequence of sentences is scrambled. And once I found the
slightest hint of weirdness that led me straight to the answer.