LSAT 139 – Section 1 – Question 10
LSAT 139 - Section 1 - Question 10
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| Question QuickView |
Type | Tags | Answer Choices |
Curve | Question Difficulty |
Psg/Game/S Difficulty |
Explanation |
|---|---|---|---|---|---|---|---|
| PT139 S1 Q10 |
+LR
| Most strongly supported +MSS Conditional Reasoning +CondR | A
0%
147
B
0%
145
C
1%
151
D
98%
165
E
0%
149
|
131 137 143 |
+Easier | 142.273 +SubsectionEasier |
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Summary
Large deposits of a rare mineral, nahcolite, formed in salty lakes over 50 million years ago during a time in history called the Eocene epoch. Experiments revealed that, in salty water, nahcolite can form only when the atmosphere contains at least 1,125 parts per million of carbon dioxide.
Strongly Supported Conclusions
The atmosphere contained at least 1,125 parts per million of carbon dioxide sometime during the Eocene epoch.
A
For most of the time since the Eocene epoch, the level of carbon dioxide in the atmosphere has been lower than it was during most of the Eocene epoch.
This comparative statement is not supported anywhere. The stimulus does not say anything about the relative levels of CO2 in the atmosphere during the Eocene epoch. It only implies that at some point in the epoch, the levels were high enough to form nahcolite.
B
Levels of carbon dioxide in the atmosphere fluctuated greatly during the Eocene epoch.
There is no evidence to suggest that these levels fluctuated. For all we know, they could still be the same today. All we know is that the levels were enough to form nahcolite.
C
Lakes were more likely to be salty during periods when the level of carbon dioxide in the atmosphere was at least 1,125 parts per million.
There is no support in the stimulus for whether a lake was more likely to be salty.
D
The atmosphere contained at least 1,125 parts per million of carbon dioxide during at least some part of the Eocene epoch.
The stimulus says that this mineral was formed during the Eocene epoch and that it could only have formed when the atmosphere contained at least 1,1125 parts per million of carbon. This is not only supported, but it must be true.
E
No significant deposits of nahcolite have formed at any time since the Eocene epoch.
This requires an assumption that the level of CO2 in the atmosphere has changed since the Eocene epoch. There is no support for this in the stimulus.
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Review Results
LSAT PrepTest 139 Explanations
Section 1 - Logical Reasoning
- Question 01
- Question 02
- Question 03
- Question 04
- Question 05
- Question 06
- Question 07
- Question 08
- Question 09
- Question 10
- Question 11
- Question 12
- Question 13
- Question 14
- Question 15
- Question 16
- Question 17
- Question 18
- Question 19
- Question 20
- Question 21
- Question 22
- Question 23
- Question 24
- Question 25
Section 2 - Reading Comprehension
- Passage 1 – Passage
- Passage 1 – Questions
- Passage 2 – Passage
- Passage 2 – Questions
- Passage 3 – Passage
- Passage 3 – Questions
- Passage 4 – Passage
- Passage 4 – Questions
Section 3 - Reading Comprehension
- Passage 1 – Passage
- Passage 1 – Questions
- Passage 2 – Passage
- Passage 2 – Questions
- Passage 3 – Passage
- Passage 3 – Questions
- Passage 4 – Passage
- Passage 4 – Questions
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