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Course: LSAT > Unit 1
Lesson 10: Reading Comprehension - Worked Examples- Law passage overview | Cosmic Justice (paired passages)
- Main point | Law passage | Cosmic Justice
- Recognition | Law passage | Cosmic Justice
- Inferences about views | Law passage | Cosmic Justice
- Inferences about info | Law passage | Cosmic Justice
- Principles | Law passage | Cosmic Justice
- Analogies | Law passage | Cosmic Justice
- Law passage overview | Copyright
- Main point | Law passage | Copyright
- Purpose of reference | Law passage | Copyright
- Applying to new contexts | Law passage | Copyright
- Humanities passage overview | Music (paired passages)
- Main point 1 | Humanities passage | Music
- Main point 2 | Humanities passage | Music
- Recognition | Humanities passage | Music
- Inferences about views | Humanities passage | Music
- Principles and analogies | Humanities passage | Music
- Additional evidence | Humanities passage | Music
- Primary purpose | Humanities passage | Music
- Science passage overview | The Sun
- Recognition 1 | Science passage | The Sun
- Recognition 2 | Science passage | The Sun
- Organizing info | Science passage | The Sun
- Inferences about views 1 | Science passage | The Sun
- Inferences about views 2 | Science passage | The Sun
- Inferences about views 3 | Science passage | The Sun
- Inferences about info | Science passage | The Sun
- Social science passage overview | Wool
- Main point | Social science passage | Wool
- Recognition 1 | Social science passage | Wool
- Recognition 2 | Social science passage | Wool
- Inferences about info | Social science passage | Wool
- Inferences about attitudes | Social science passage | Wool
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Recognition 1 | Science passage | The Sun
Watch a demonstration of one way to answer a Recognition question from a science passage on the LSAT. Created by Dave Travis.
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- 1:59Explanation2:23Answer
I don't like this question on a technical aspect. There is an assumption made of evidence not presented in the passage. Answer C states "In the solar system." The passage does mention all known asteroids contain iron, but it does not state that there are any asteroids in the solar system. Obviously, it is known that we have asteroids within our solar system; however, it is stated that we should not utilize outside knowledge for these questions. Without prior knowledge unrelated to this passage that there are asteroids in our solar system, this question cannot objectively be answered correctly.(2 votes) - I initially thought the answer for this was A, because in lines 41-42, the passage specifies that Payne found "90% of the sun is hydrogen and most of the remainder is helium"; therefore, we can answer question A with no, the iron content of the sun does not exceed 50%. In this circumstance, how should I approach this to know which one is the correct answer?(0 votes)
Video transcript
- [Instructor] The passage
provides enough information to answer which one of
the following questions? Okay, so... So four of these things, we're
not gonna be able to answer with the information with the passage. And one of them, the answer
will be in the passage. So this is really a question
of how much we remembered, but if we need to go back
to the passage, we can. Okay. A, does the iron content
of Earth exceed 50% of its total mass? I don't know if they said
how much iron is in Earth. I don't remember them seeing a number. So this kind of makes me
think that that probably we don't know the answer to this. We can look for a little bit later. B, who first proved that
the sun generates heat from hydrogen by nuclear fusion? Um, I don't think they told us that. We know that Einstein was
involved in like the prove event, but we don't, we don't-- it wasn't about the proof of that. C, do any objects in the
solar system other than the Earth and the sun contain iron? Ah yes, I believe that that
was mentioned so let's-- They mentioned asteroids, I think. But we can go on back
and make sure about that. What percentage of the sun's
mass is composed of iron? Let's see. They definitely mentioned
that there's iron in the sun. So we can look for that in a minute. Can the fusion of atoms
other than hydrogen atoms produce energy? There was no talk of
other kinds of fusion. So that's definitely out. We can just get rid of this choice, and get rid of this choice. And now what we can do
is we can, you know, look for these other ideas. Does the iron content of Earth
exceed 50% of its total mass? Let's have a look this passage. Okay, so... Let's see where we are. Hydrogen and helium, okay. Let's start. We're looking for iron. Orthodox view that the
sun was mainly iron, was buttressed by the knowledge of Earth, Earth and all known asteroids. All known asteroids contain iron. So there's our answer. They also don't know exactly
how much iron is in Earth. That wasn't mentioned. So we can definitely cross out this one. And we didn't know exactly
how much there was there. So we have our answer. Asteroids.