Directions Read the following passage for 3 minutes. You may take notes while you read. You will be able to see the reading passage again when it is time for you to write. You may use your notes to help you answer the question.
In the Tunguska region of Siberia, Russia, in late June 1908, there occurred one of the largest explosions in history. It was a tremendous event with the power of a large nuclear weapon. There have been many theories as to what caused this explosion, including one that states an asteroid struck the ground there. However, the most likely explanation was that this was a large, methane gas explosion.
Despite the fact that the first examination of the site was only done in 1927, there have been many expeditions there since then. None of them have shown any evidence of an asteroid strike. No rocks or material from an asteroid have ever been recovered. Asteroid rocks have high concentrations of nickel and iridium and thus would be easily detectable. Finally, no witnesses ever emerged to attest to the fact that they saw an asteroid streaking across the sky.
Known asteroid sites on Earth leave large impact craters, but Tunguska has none. Some people believe that a lake was the impact crater, yet researchers have found mud silt at its bottom that dates back to more than 5,000 years in the past. However, an area of forest 50 kilometers wide was devastated. Trees were knocked down and stripped of their branches and bark. These effects are more consistent with a gas, like methane explosion.
Tunguska has many rivers, lakes, swamps, and peat bogs, and it is known for having high levels of methane gas. One extremely believable theory suggests that a high concentration of methane gas built up underground. It was then released, either by humans or naturally, causing it to explode when it was above the forest, thereby destroying many trees. In fact, some eyewitnesses reported seeing lightning nearby, which could have caused the gas to detonate.
The reading and the lecture are both about a large explosion once happened in Russia in 1908. The author of the reading believes that explosion of methane gas was the reason of the explosion. The lecturer, however, casts doubt on the claims made in the article mentioning that an asteroid collision with the atmosphere was the probable cause of the explosion.
First of all, the author of the reading claims that asteroids have a large amount of nickel and iridium which have never been found in the area. He/She says that nobody has seen an asteroid crossing the sky. This point is challenged by the lecturer. He believes that some people have seen a red light in the sky just before the explosion; and a strong wind also is reported, both of which can be signs of an asteroid collaps. Furthermore, he points out that since the asteroid had exploded above the earth, there was not much evidence remained when scientists arrived.
Secondly, the author states that researchers never found any impact crater on the surface, and what some people believe to be the crater, was actually a lake. He/She argues that a large area of destroyed trees and the destruction pattern are similar to what remains after a methane gas explosion. The lecturer rebuts this. He suggests that the asteroid was exploded in the sky and as a result no crater was created. He elaborates on this by mentioning that the remnant of trees was similar to laboratory experiments in asteroid collision.
Finally, the author mentions that the region had many rivers, lakes, etc., and in such an area, a great amount of methane is expected. He/She is of the opinion that this gas might be released and caused the explosion. The lecturer, on the other hand, states that an explosion like what happened in the Tunguska, requires a massive amount of methane, and there was not enough methane for that. He puts forth the idea that burning of this much methane makes a large fire, but no fire was reported at the time.
Grammar and spelling errors:
Line 1, column 193, Rule ID: ENGLISH_WORD_REPEAT_BEGINNING_RULE
Message: Three successive sentences begin with the same word. Reword the sentence or use a thesaurus to find a synonym.
...ne gas was the reason of the explosion. The lecturer, however, casts doubt on the c...
^^^
Transition Words or Phrases used:
actually, also, but, finally, first, furthermore, however, second, secondly, so, as a result, first of all, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 19.0 10.4613686534 182% => OK
Auxiliary verbs: 2.0 5.04856512141 40% => OK
Conjunction : 10.0 7.30242825607 137% => OK
Relative clauses : 18.0 12.0772626932 149% => OK
Pronoun: 31.0 22.412803532 138% => Less pronouns wanted
Preposition: 42.0 30.3222958057 139% => OK
Nominalization: 2.0 5.01324503311 40% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1639.0 1373.03311258 119% => OK
No of words: 345.0 270.72406181 127% => OK
Chars per words: 4.75072463768 5.08290768461 93% => OK
Fourth root words length: 4.3097767484 4.04702891845 106% => OK
Word Length SD: 2.44616731021 2.5805825403 95% => OK
Unique words: 169.0 145.348785872 116% => OK
Unique words percentage: 0.489855072464 0.540411800872 91% => More unique words wanted or less content wanted.
syllable_count: 511.2 419.366225166 122% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 9.0 3.25607064018 276% => Less pronouns wanted as sentence beginning.
Article: 9.0 8.23620309051 109% => OK
Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted.
Conjunction: 5.0 1.51434878587 330% => Less conjunction wanted as sentence beginning.
Preposition: 1.0 2.5761589404 39% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 17.0 13.0662251656 130% => OK
Sentence length: 20.0 21.2450331126 94% => OK
Sentence length SD: 43.998033929 49.2860985944 89% => OK
Chars per sentence: 96.4117647059 110.228320801 87% => OK
Words per sentence: 20.2941176471 21.698381199 94% => OK
Discourse Markers: 7.35294117647 7.06452816374 104% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 1.0 4.19205298013 24% => OK
Sentences with positive sentiment : 3.0 4.33554083885 69% => OK
Sentences with negative sentiment : 6.0 4.45695364238 135% => OK
Sentences with neutral sentiment: 8.0 4.27373068433 187% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.0428466239053 0.272083759551 16% => The similarity between the topic and the content is low.
Sentence topic coherence: 0.0163816916417 0.0996497079465 16% => Sentence topic similarity is low.
Sentence topic coherence SD: 0.0194948900614 0.0662205650399 29% => Sentences are similar to each other.
Paragraph topic coherence: 0.0316126949839 0.162205337803 19% => Maybe some paragraphs are off the topic.
Paragraph topic coherence SD: 0.0173171994416 0.0443174109184 39% => Paragraphs are similar to each other. Some content may get duplicated or it is not exactly right on the topic.
Essay readability:
automated_readability_index: 11.1 13.3589403974 83% => Automated_readability_index is low.
flesch_reading_ease: 59.64 53.8541721854 111% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 9.9 11.0289183223 90% => OK
coleman_liau_index: 10.27 12.2367328918 84% => OK
dale_chall_readability_score: 7.88 8.42419426049 94% => OK
difficult_words: 71.0 63.6247240618 112% => OK
linsear_write_formula: 9.0 10.7273730684 84% => OK
gunning_fog: 10.0 10.498013245 95% => OK
text_standard: 10.0 11.2008830022 89% => OK
What are above readability scores?
---------------------
Write the essay in 20 minutes.
It is not exactly right on the topic in the view of e-grader. Maybe there is a wrong essay topic.
Rates: 3.33333333333 out of 100
Scores by essay e-grader: 1.0 Out of 30
---------------------
Note: the e-grader does NOT examine the meaning of words and ideas. VIP users will receive further evaluations by advanced module of e-grader and human graders.