At the end of the Triassic period 200 million years ago, there was a mass-extinction event that caused the extinction of more than half of all living species. it was this extinction event that allowed dinosaurs to become the dominant species for the next 145 million years. we do not know exactly what happened that eliminated so many species in a relatively short period of time, but there are seveal possible explanations.
The lecture and the passage discuss the possibilities of the mass extinction at the end of the Triassic period. The reading brings three possible explanations for that phenomenon. However, the professor in the lecture argues against those explanations and say that they cannot be logical reasons for the mass extinction.
First, the writer mentions that a sea level' decline eradicated the ocean population that lived in shallow water and distracted food chains. While the lecturer disagrees with this idea and points out that coastal and shallow water had an adaptation ability with fluctuation in the sea level. If that decline had occurred suddenly we could have expected such extinction. However, that decline in the sea level occurred quite gradual in several million years. Therefore, such widespread effects could not be related to the fluctuation of the sea level.
Second, the passage claims that climate cooling due to the released sulfur dioxide of volcanoes destroyed many species. Although the professor argues against that and believes that the sulfur dioxide could not stay in the atmosphere for a long time. The SO2 combines with water in the atmosphere and comes to the earth level by rain. This procedure doesn't take a long time and it could not affect the earth temperature significantly. Hence, climate cooling could not be a good reason for the mass extinction.
Finally, the reading expresses that displaced debris due to an asteroid strike thrown up to the atmosphere and blocked the sunlight. Whereas, the lecture retorts this notion and states that evidence does not reveal such a strike in that period. Such a strike had occurred twelve million years before the mass extinction. Consequently, this time interval between two occurrences is a logical reason to reject the possibility of the mass-extinction due to an asteroid strike.
Although the writer brings three possible explanations for mass-extinction, the lecture makes a reasonable argument against it to demonstrate they aren't the principal reason of the mass-extinction.
| Post date | Users | Rates | Link to Content |
|---|---|---|---|
| 2020-01-17 | nusybah | 80 | view |
| 2019-11-14 | M.S 2019 | 76 | view |
| 2019-10-24 | p0uya | 65 | view |
| 2019-10-24 | Seema Modak | 71 | view |
| 2019-10-08 | mahan vahab kashi | 80 | view |
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Grammar and spelling errors:
Line 3, column 292, Rule ID: SENTENCE_FRAGMENT[1]
Message: “If” at the beginning of a sentence requires a 2nd clause. Maybe a comma, question or exclamation mark is missing, or the sentence is incomplete and should be joined with the following sentence.
...lity with fluctuation in the sea level. If that decline had occurred suddenly we c...
^^
Line 5, column 350, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: doesn't
...the earth level by rain. This procedure doesnt take a long time and it could not affec...
^^^^^^
Line 8, column 148, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: aren't
...argument against it to demonstrate they arent the principal reason of the mass-extinc...
^^^^^
Transition Words or Phrases used:
consequently, finally, first, hence, however, if, second, so, therefore, whereas, while
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 4.0 10.4613686534 38% => More to be verbs wanted.
Auxiliary verbs: 6.0 5.04856512141 119% => OK
Conjunction : 10.0 7.30242825607 137% => OK
Relative clauses : 13.0 12.0772626932 108% => OK
Pronoun: 23.0 22.412803532 103% => OK
Preposition: 34.0 30.3222958057 112% => OK
Nominalization: 14.0 5.01324503311 279% => Less nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1743.0 1373.03311258 127% => OK
No of words: 325.0 270.72406181 120% => OK
Chars per words: 5.36307692308 5.08290768461 106% => OK
Fourth root words length: 4.24591054749 4.04702891845 105% => OK
Word Length SD: 2.88656713459 2.5805825403 112% => OK
Unique words: 157.0 145.348785872 108% => OK
Unique words percentage: 0.483076923077 0.540411800872 89% => More unique words wanted or less content wanted.
syllable_count: 525.6 419.366225166 125% => OK
avg_syllables_per_word: 1.6 1.55342163355 103% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 3.0 3.25607064018 92% => OK
Article: 9.0 8.23620309051 109% => OK
Subordination: 4.0 1.25165562914 320% => Less adverbial clause wanted.
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 0.0 2.5761589404 0% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 18.0 13.0662251656 138% => OK
Sentence length: 18.0 21.2450331126 85% => The Avg. Sentence Length is relatively short.
Sentence length SD: 33.8312807259 49.2860985944 69% => OK
Chars per sentence: 96.8333333333 110.228320801 88% => OK
Words per sentence: 18.0555555556 21.698381199 83% => OK
Discourse Markers: 4.83333333333 7.06452816374 68% => OK
Paragraphs: 5.0 4.09492273731 122% => OK
Language errors: 3.0 4.19205298013 72% => OK
Sentences with positive sentiment : 1.0 4.33554083885 23% => More positive sentences wanted.
Sentences with negative sentiment : 9.0 4.45695364238 202% => Less negative sentences wanted.
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: 0.126889402483 0.272083759551 47% => OK
Sentence topic coherence: 0.0449049994865 0.0996497079465 45% => OK
Sentence topic coherence SD: 0.0595160357678 0.0662205650399 90% => OK
Paragraph topic coherence: 0.0759366252299 0.162205337803 47% => OK
Paragraph topic coherence SD: 0.049016637317 0.0443174109184 111% => OK
Essay readability:
automated_readability_index: 12.8 13.3589403974 96% => OK
flesch_reading_ease: 53.21 53.8541721854 99% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 10.3 11.0289183223 93% => OK
coleman_liau_index: 13.51 12.2367328918 110% => OK
dale_chall_readability_score: 8.61 8.42419426049 102% => OK
difficult_words: 84.0 63.6247240618 132% => OK
linsear_write_formula: 8.5 10.7273730684 79% => OK
gunning_fog: 9.2 10.498013245 88% => OK
text_standard: 9.0 11.2008830022 80% => OK
What are above readability scores?
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Write the essay in 20 minutes.
Rates: 60.0 out of 100
Scores by essay e-grader: 18.0 Out of 30
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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.