Soal UN 2012 – Explanation Text
Toba Eruption
Approximately 74,000 years ago on the island of Sumatra, Indonesia , a volcanic eruption so violent occurred that it proved to be apocalyptic for the human race. Scientist estimate that the eruption may have ejected up to 6,000 km3 of magma pulverized rock and sufficient sulfur gases to form 5,000 megaton of stratospheric sulfuric acid aerosols. The suspension of so much material in the earth’s atmosphere resulted in a volcanic winter that lasted all year long, every year for several years .The severe drop in global temperature had catastrophic effect on vegetation and the food chain dependent upon it for survival-including humans.
Scientists have examined the genetic code of seemingly disparate and distance race of people and found there’s actually very little genetic variability in the entire human race. The evidence indicates that something happened to the human gene pool approximately 74,000 years ago where only very few humans remained alive on the planet (say 5,000 to 10,000), and the current population has grown from these selectively few genotypes. Our existence in such great number today (over 6 billion strong) is a testament to our tenacious ability to survive.
36. What caused the disaster to the human race after the Toba eruption ?
A. The severe drop in global temperature .
B. The stratospheric sulfuric acid.
C. The sulfur gases.
D. The magma and the pulverized rock.
E. The eruption of the mountains Sumatra.
37. What was the most destructive impact of the Toba eruption around 74.000 year ago?
A. The extinction of human race is Sumatra.
B. The extinction of vegetation and food chains.
C. Volcanic winter every year for several years.
D. The rain of stratospheric sulfuric acid.
E. The 6,000 km3 of magma covering the island of Sumatra.
38. We know from the text that . . . .
A. The eruption was the reason for the very limited genetic variability in the entire human race.
B. A new human race appeared after the extinction of humans 74.000 years ago.
C. Human beings were stronger that vegetation against the affect the effect the eruption.
D. The volcanic materials ejected by the eruption consisted of magma and pulverized rock.
E. The severe drops of sulfuric acid aerosols caused the volcanic winter.
Toba Eruption
Approximately 74,000 years ago on the island of Sumatra, Indonesia , a volcanic eruption so violent occurred that it proved to be apocalyptic for the human race. Scientist estimate that the eruption may have ejected up to 6,000 km3 of magma pulverized rock and sufficient sulfur gases to form 5,000 megaton of stratospheric sulfuric acid aerosols. The suspension of so much material in the earth’s atmosphere resulted in a volcanic winter that lasted all year long, every year for several years .The severe drop in global temperature had catastrophic effect on vegetation and the food chain dependent upon it for survival-including humans.
Scientists have examined the genetic code of seemingly disparate and distance race of people and found there’s actually very little genetic variability in the entire human race. The evidence indicates that something happened to the human gene pool approximately 74,000 years ago where only very few humans remained alive on the planet (say 5,000 to 10,000), and the current population has grown from these selectively few genotypes. Our existence in such great number today (over 6 billion strong) is a testament to our tenacious ability to survive.
36. What caused the disaster to the human race after the Toba eruption ?
A. The severe drop in global temperature .
B. The stratospheric sulfuric acid.
C. The sulfur gases.
D. The magma and the pulverized rock.
E. The eruption of the mountains Sumatra.
37. What was the most destructive impact of the Toba eruption around 74.000 year ago?
A. The extinction of human race is Sumatra.
B. The extinction of vegetation and food chains.
C. Volcanic winter every year for several years.
D. The rain of stratospheric sulfuric acid.
E. The 6,000 km3 of magma covering the island of Sumatra.
38. We know from the text that . . . .
A. The eruption was the reason for the very limited genetic variability in the entire human race.
B. A new human race appeared after the extinction of humans 74.000 years ago.
C. Human beings were stronger that vegetation against the affect the effect the eruption.
D. The volcanic materials ejected by the eruption consisted of magma and pulverized rock.
E. The severe drops of sulfuric acid aerosols caused the volcanic winter.
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