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# End of the Triassic - cause and effect IR question

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Manager
Joined: 12 Nov 2016
Posts: 138
Concentration: Entrepreneurship, Finance
GMAT 1: 620 Q36 V39
GMAT 2: 650 Q47 V33
End of the Triassic - cause and effect IR question  [#permalink]

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11 Nov 2017, 22:46
1
Journalist: The end of the Triassic, the geologic period that extended from about 250 to 200 million years ago, has traditionally been blamed on volcanic eruptions that went on for 600,000 years. However, a researcher has recently suggested that these eruptions were only an indirect cause. By analyzing the isotopic composition of hydrocarbon molecules from plant waxes from the period, he discovered what looks like a spike in the amount of nonbiological carbon in the atmosphere, lasting between 10,000 and 20,000 years. The researcher believes that the release of methane—a carbon-containing greenhouse gas much stronger than carbon dioxide—stored at the bottom of the ocean was the direct cause of the end of the Triassic.

The journalist suggests that a certain causal sequence may have brought about the end of the Triassic period. Identify in the table the sequence of cause and effect most strongly suggested by the journalist to have resulted in the end of the Triassic. Make only two selections, one in each column.

Cause Effect
The emissions of volcanoes into the atmosphere

The extinction of many oceanic biological species

The eruption of volcanoes

The release of carbon dioxide into the atmosphere

The release of methane from the bottom of the ocean
Manager
Joined: 17 Nov 2009
Posts: 69
Location: Switzerland
Concentration: Entrepreneurship, Technology
GMAT 1: 740 Q47 V45
Re: End of the Triassic - cause and effect IR question  [#permalink]

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18 Jan 2018, 01:23
1
I would go for:

Cause
The eruption of volcanoes

Effect
The release of methane from the bottom of the ocean
Manager
Joined: 13 Nov 2017
Posts: 59
Re: End of the Triassic - cause and effect IR question  [#permalink]

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20 Jan 2018, 23:18
Erjan_S wrote:
Journalist: The end of the Triassic, the geologic period that extended from about 250 to 200 million years ago, has traditionally been blamed on volcanic eruptions that went on for 600,000 years. However, a researcher has recently suggested that these eruptions were only an indirect cause. By analyzing the isotopic composition of hydrocarbon molecules from plant waxes from the period, he discovered what looks like a spike in the amount of nonbiological carbon in the atmosphere, lasting between 10,000 and 20,000 years. The researcher believes that the release of methane—a carbon-containing greenhouse gas much stronger than carbon dioxide—stored at the bottom of the ocean was the direct cause of the end of the Triassic.

The journalist suggests that a certain causal sequence may have brought about the end of the Triassic period. Identify in the table the sequence of cause and effect most strongly suggested by the journalist to have resulted in the end of the Triassic. Make only two selections, one in each column.

Cause Effect
The emissions of volcanoes into the atmosphere

The extinction of many oceanic biological species

The eruption of volcanoes

The release of carbon dioxide into the atmosphere

The release of methane from the bottom of the ocean

IMO, cause : The release of methane from the bottom of the ocean
effect : The reelase of carbon dioxide into the atmostphere

A.The emissions of volcanoes into the atmosphere
-> The journalist argues that emissons of volcanoes are indirect reason.
B.The extinction of many oceanic biological species
-> Not mentioned
C.The eruption of volcanoes
-> Same as A
D.The release of carbon dioxide into the atmosphere
-> The journalist argues that there was 'the amount of nonbiological carbon in the atmosphere'.
So it would be effect.
E.The release of methane from the bottom of the ocean
-> The journalist argues that the release of methan is direct cause. So cause is E

I am not sure this is correct. If not, is there anyone who can let me know what is correct?
Manager
Joined: 04 Oct 2017
Posts: 72
Re: End of the Triassic - cause and effect IR question  [#permalink]

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28 Jan 2018, 22:35
HG0815 wrote:
Erjan_S wrote:
Journalist: The end of the Triassic, the geologic period that extended from about 250 to 200 million years ago, has traditionally been blamed on volcanic eruptions that went on for 600,000 years. However, a researcher has recently suggested that these eruptions were only an indirect cause. By analyzing the isotopic composition of hydrocarbon molecules from plant waxes from the period, he discovered what looks like a spike in the amount of nonbiological carbon in the atmosphere, lasting between 10,000 and 20,000 years. The researcher believes that the release of methane—a carbon-containing greenhouse gas much stronger than carbon dioxide—stored at the bottom of the ocean was the direct cause of the end of the Triassic.

The journalist suggests that a certain causal sequence may have brought about the end of the Triassic period. Identify in the table the sequence of cause and effect most strongly suggested by the journalist to have resulted in the end of the Triassic. Make only two selections, one in each column.

Cause Effect
The emissions of volcanoes into the atmosphere

The extinction of many oceanic biological species

The eruption of volcanoes

The release of carbon dioxide into the atmosphere

The release of methane from the bottom of the ocean

IMO, cause : The release of methane from the bottom of the ocean
effect : The reelase of carbon dioxide into the atmostphere

A.The emissions of volcanoes into the atmosphere
-> The journalist argues that emissons of volcanoes are indirect reason.
B.The extinction of many oceanic biological species
-> Not mentioned
C.The eruption of volcanoes
-> Same as A
D.The release of carbon dioxide into the atmosphere
-> The journalist argues that there was 'the amount of nonbiological carbon in the atmosphere'.
So it would be effect.
E.The release of methane from the bottom of the ocean
-> The journalist argues that the release of methan is direct cause. So cause is E

I am not sure this is correct. If not, is there anyone who can let me know what is correct?

The gas discussed is methane not carbondioxide.
Intern
Joined: 09 May 2018
Posts: 4
Re: End of the Triassic - cause and effect IR question  [#permalink]

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08 Aug 2018, 17:21
Can some one post the right ans?

I believe the answer is as follows

Cause - The release of methane from the bottom of the ocean - It is given that it contains high carbon

Effect - The extinction of many oceanic biological species - if the methane is going to release from ocean, then many of the species may get extinct

Bunuel souvik101990 AbdurRakib
egmat Maxximus
Re: End of the Triassic - cause and effect IR question &nbs [#permalink] 08 Aug 2018, 17:21
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# End of the Triassic - cause and effect IR question

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