PT115.S4.Q17

SECTION 1 · rc

PASSAGE 1
Question 1 Question 2 Question 3 Question 4 Question 5

PASSAGE 2
Question 6 Question 7 Question 8 Question 9 Question 10 Question 11 Question 12

PASSAGE 3
Question 13 Question 14 Question 15 Question 16 Question 17 Question 18 Question 19 Question 20

PASSAGE 4
Question 21 Question 22 Question 23 Question 24 Question 25 Question 26 Question 27 Question 28

SECTION 2 · lr

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7 Question 8 Question 9 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

SECTION 3 · rc

PASSAGE 1
Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7 Question 8

PASSAGE 2
Question 9 Question 10 Question 11 Question 12 Question 13 Question 14 Question 15 Question 16

PASSAGE 3
Question 17 Question 18 Question 19 Question 20 Question 21 Question 22 Question 23

PASSAGE 4
Question 24 Question 25 Question 26 Question 27 Question 28

SECTION 4 · lr

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7 Question 8 Question 9 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 Question 26

PrepTest 115 - Section 4 - Question 17

Question

Explanation

Analytics

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Ecologist: Support Forest fires, the vast majority of which are started by lightning, are not only a natural phenomenon to which all forest ecosystems are well adapted, but are required for many forests to flourish. ██████ █████ ██████████ ███ ███████ ███ █████████ ██ ████ █████ ███████ ██ █████████████ ██ ████████ ███ ███████ ███ █████████ ██ ███████ ██ ██████████ ███████ █████████ ██ ██████████ █████ ████ ██████████ █████ ████████ ██ ████ ██ █████ ██████████ ████████ ██ █████ ██████ ██ ███████ ██ ███████ ██████ █████ ███ ███████████ ███ █████████████ ██████ █████ ██████ ██ ████ █████ ███ ███████ ██ ████ ██████████ ███ ██████████

Summary

The author concludes that humans should not try to prevent or control forest fires; rather, forest fires should be left alone and allowed to burn out naturally. This is based on the fact that forest fires are required for many forests to flourish.

Missing Connection

The conclusion tells us that we shouldn’t try to prevent or control forest fires. But the premise doesn’t tell us anything about when we “should not” do something. All we know from the premise is that many forests need forest fires in order for their ecosystems to flourish. The correct answer needs to connect this premise to something prescriptive. For example, “If forest fires are required by many forests to flourish, then humans should not try to prevent or control forest fires.”

Analysis by KevinLin

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17.

The conclusion drawn above follows █████████ ██ █████ ███ ██ ███ █████████ ██ ████████

Human intervention in ███████ █████████ █████ ██ ██████ ███ ██████████ █████████ ██ ███████████

(A) doesn’t tell me why we “should not” do something. Sure, maybe human intervention reduces biological diversity...but is that something we should care about? We don’t know.

Protection of forests ███ █████ ██████████ ██ ███ ████ ██████████ ██████ ███ ██████████ ██ ███████ ██ ███████ ██████ ██████

(B) isolates protection of forests and their ecosystems as the only “legitimate” reason for trying to prevent or control forest fires. In other words, no other consideration should matter when deciding whether to prevent/control forest fires. And, since we know from the premise that forest fires are good for the protection of forests, (B) implies that we should not prevent/control fires.

Forest fires begun ██ ████████ ███████ ██████ ██ ███ ██████ ██ █████ ████ ███████ ████████

We’re trying to conclude that we shouldn’t systematically prevent/control forest fires. (C) goes in the opposite direction.

Humans tend to ████ ███████ ██ ████ ██ █████ ██████████ ██ ███████████ ███ ███ ████████████ ██ █████ ██████

(D) doesn’t establish that we shouldn’t try to prevent/control fires. How humans perceive forests doesn’t prove anything about what humans should not do.

If the health ██ ██ █████████ ██ ██████████ ██ ███████ ██ █████ ██████████ █████ ██████ ██████ ███ █████████ ██ █████ ████ ███████

(E) concerns threats to an ecosystem by insects or other predators. But we have no reason to think this is related to threats posed by forest fires. What humans should do in response to threats by insects or other predators does not prove what they should do in response to forest fires.

Difficulty

Question

50% of people who answer get this correct

This is a very difficult question.

CURVE

Score of students with a 50% chance of getting this right

25% 152

162

75% 172

Analysis

Question Stem Tags

Sufficient assumption

Stimulus Tags

Link assumption

Value judgment

Answer Popularity

Popularity Avg. score

38%

158

50%

165

157

159

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