sea cows' extinction
The material discusses the reasons of Steller's sea cows' extinction. While the reading looks at the topic from one perspective, the listening challenges certain points outlined in the reading passage.
First, the reading claims that Siberian people overhunted sea cows. On the contrary, the listening challenges this and states that sea cows were massive creatures, one of them was nine-meter-long and ten tons weight, so it could feed a village of Siberian for a month, in addition to that, the Siberian population were not very large; thus, they did not need to hunt a lot of them and cause their extinction.
Second, the author mentions that ecosystem fluctuation declined kelp, which was sea cows' main source of food. In contrast, the lecturer opposes this and explains that if there were ecosystems disturbances on 1768, it should decline other marines, such as whales; however, there is no report of any decline of whales at the same time; hence, kelp should grow fine and sea cows did not have any food shortage.
Third, the author posits that the European fur traders were responsible for the extinction. Conversely, the professor contradicts this and states that when the European traders arrived, the sea cows populations was already quite small, the populations were declined 100 of years before 1700, so there was something that happened long before the European arrival and caused the extinction.
| Post date | Users | Rates | Link to Content |
|---|---|---|---|
| 2019-12-18 | jeffhjz | 66 | view |
| 2019-11-29 | nagy | 73 | view |
| 2019-10-21 | Christine hanna | 88 | view |
| 2019-10-21 | Christine hanna | 83 | view |
| 2019-10-09 | Christine hanna | 60 | view |
Grammar and spelling errors:
Line 7, column 390, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...pean arrival and caused the extinction.
^^^^^^
Transition Words or Phrases used:
conversely, first, hence, however, if, look, second, so, third, thus, while, in addition, in contrast, such as, on the contrary
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 10.0 10.4613686534 96% => OK
Auxiliary verbs: 4.0 5.04856512141 79% => OK
Conjunction : 7.0 7.30242825607 96% => OK
Relative clauses : 10.0 12.0772626932 83% => OK
Pronoun: 17.0 22.412803532 76% => OK
Preposition: 19.0 30.3222958057 63% => OK
Nominalization: 7.0 5.01324503311 140% => OK
Performance on vocabulary words:
No of characters: 1186.0 1373.03311258 86% => OK
No of words: 229.0 270.72406181 85% => More content wanted.
Chars per words: 5.17903930131 5.08290768461 102% => OK
Fourth root words length: 3.89008302616 4.04702891845 96% => OK
Word Length SD: 2.68061811314 2.5805825403 104% => OK
Unique words: 134.0 145.348785872 92% => More unique words wanted.
Unique words percentage: 0.585152838428 0.540411800872 108% => OK
syllable_count: 351.9 419.366225166 84% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 2.0 3.25607064018 61% => OK
Article: 11.0 8.23620309051 134% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 3.0 2.5761589404 116% => OK
Performance on sentences:
How many sentences: 8.0 13.0662251656 61% => Need more sentences. Double check the format of sentences, make sure there is a space between two sentences, or have enough periods. And also check the lengths of sentences, maybe they are too long.
Sentence length: 28.0 21.2450331126 132% => The Avg. Sentence Length is relatively long.
Sentence length SD: 108.065662909 49.2860985944 219% => The lengths of sentences changed so frequently.
Chars per sentence: 148.25 110.228320801 134% => OK
Words per sentence: 28.625 21.698381199 132% => OK
Discourse Markers: 15.875 7.06452816374 225% => Less transition words/phrases wanted.
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 : 2.0 4.45695364238 45% => More negative sentences wanted.
Sentences with neutral sentiment: 3.0 4.27373068433 70% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.182260475161 0.272083759551 67% => OK
Sentence topic coherence: 0.0957243826685 0.0996497079465 96% => OK
Sentence topic coherence SD: 0.0733751307167 0.0662205650399 111% => OK
Paragraph topic coherence: 0.113232275134 0.162205337803 70% => OK
Paragraph topic coherence SD: 0.0246418653733 0.0443174109184 56% => OK
Essay readability:
automated_readability_index: 17.3 13.3589403974 130% => OK
flesch_reading_ease: 51.52 53.8541721854 96% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 13.0 11.0289183223 118% => OK
coleman_liau_index: 13.36 12.2367328918 109% => OK
dale_chall_readability_score: 8.47 8.42419426049 101% => OK
difficult_words: 50.0 63.6247240618 79% => More difficult words wanted.
linsear_write_formula: 13.5 10.7273730684 126% => OK
gunning_fog: 13.2 10.498013245 126% => OK
text_standard: 14.0 11.2008830022 125% => OK
What are above readability scores?
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Rates: 88.3333333333 out of 100
Scores by essay e-grader: 26.5 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.