Steller's sea cow
Both reading and the lecture discuss the reasons for the extinction of Steller's sea cow. In this set of materials, the author strongly postulates that in 1768 the Steller's sea cow became extinct around Bering Island off the coast of Siberia and mentions three theories about its disappearance. The professor, on the other hand, states that the theories are wrong and gainsays each of them.
First and foremost, the author claims that the sea cow may have vanished because the inhabitants of Siberia killed the animal to survive i.e. food. However, the speaker explains that if this is true, only one sea cow would have been enough for a month's supply of people's bread. Besides, he states the residents could not have been dependent only on sea cows since the number of sea cows was limited in Siberia.
Secondly, the article mentions that the Steller's sea cow no longer exists because of the reduction in kelp( a kind of sea plant) that was the main source of food for the species. On the contrary, the professor does not support this theory because he believes that if the animals depended on sea plants, along with sea cows, other sea animals, for instance, whales, would also have become extinct. As this is not what happened, it can be concluded that the kelps didn't stop growing.
Lastly, the excerpt posits that the sea cow could have been eliminated in 1976 since they were being haunted by a special kind of weapons used by European fur traders who entered Bering Island in 1741. Conversely, the professor indicates that the animals were long gone 100 years ago even before the fur traders came to Island. He further points out that the animals became extinct due to an unknown reason which casts doubt on this hypothesis of the third reason for extinction.
Comments
Essay evaluations by e-grader
Grammar and spelling errors:
Line 5, column 461, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: didn't
...ned, it can be concluded that the kelps didnt stop growing. Lastly, the excerpt po...
^^^^^
Transition Words or Phrases used:
also, besides, conversely, first, however, if, lastly, may, second, secondly, so, third, for instance, kind of, on the contrary, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 12.0 10.4613686534 115% => OK
Auxiliary verbs: 6.0 5.04856512141 119% => OK
Conjunction : 4.0 7.30242825607 55% => More conjunction wanted.
Relative clauses : 13.0 12.0772626932 108% => OK
Pronoun: 24.0 22.412803532 107% => OK
Preposition: 36.0 30.3222958057 119% => OK
Nominalization: 5.0 5.01324503311 100% => OK
Performance on vocabulary words:
No of characters: 1467.0 1373.03311258 107% => OK
No of words: 306.0 270.72406181 113% => OK
Chars per words: 4.79411764706 5.08290768461 94% => OK
Fourth root words length: 4.18244613648 4.04702891845 103% => OK
Word Length SD: 2.30842280357 2.5805825403 89% => OK
Unique words: 174.0 145.348785872 120% => OK
Unique words percentage: 0.56862745098 0.540411800872 105% => OK
syllable_count: 433.8 419.366225166 103% => OK
avg_syllables_per_word: 1.4 1.55342163355 90% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 3.0 3.25607064018 92% => OK
Article: 8.0 8.23620309051 97% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 4.0 2.5761589404 155% => OK
Performance on sentences:
How many sentences: 12.0 13.0662251656 92% => OK
Sentence length: 25.0 21.2450331126 118% => OK
Sentence length SD: 43.8655616629 49.2860985944 89% => OK
Chars per sentence: 122.25 110.228320801 111% => OK
Words per sentence: 25.5 21.698381199 118% => OK
Discourse Markers: 12.1666666667 7.06452816374 172% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 1.0 4.19205298013 24% => OK
Sentences with positive sentiment : 4.0 4.33554083885 92% => OK
Sentences with negative sentiment : 6.0 4.45695364238 135% => OK
Sentences with neutral sentiment: 2.0 4.27373068433 47% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.434034681689 0.272083759551 160% => OK
Sentence topic coherence: 0.171552295006 0.0996497079465 172% => OK
Sentence topic coherence SD: 0.145712222117 0.0662205650399 220% => The coherence between sentences is low.
Paragraph topic coherence: 0.278299630472 0.162205337803 172% => OK
Paragraph topic coherence SD: 0.11319499336 0.0443174109184 255% => More connections among paragraphs wanted.
Essay readability:
automated_readability_index: 13.9 13.3589403974 104% => OK
flesch_reading_ease: 63.02 53.8541721854 117% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 10.7 11.0289183223 97% => OK
coleman_liau_index: 10.8 12.2367328918 88% => OK
dale_chall_readability_score: 8.28 8.42419426049 98% => OK
difficult_words: 66.0 63.6247240618 104% => OK
linsear_write_formula: 10.5 10.7273730684 98% => OK
gunning_fog: 12.0 10.498013245 114% => OK
text_standard: 11.0 11.2008830022 98% => OK
What are above readability scores?
---------------------
Rates: 80.0 out of 100
Scores by essay e-grader: 24.0 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.
Grammar and spelling errors:
Line 5, column 461, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: didn't
...ned, it can be concluded that the kelps didnt stop growing. Lastly, the excerpt po...
^^^^^
Transition Words or Phrases used:
also, besides, conversely, first, however, if, lastly, may, second, secondly, so, third, for instance, kind of, on the contrary, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 12.0 10.4613686534 115% => OK
Auxiliary verbs: 6.0 5.04856512141 119% => OK
Conjunction : 4.0 7.30242825607 55% => More conjunction wanted.
Relative clauses : 13.0 12.0772626932 108% => OK
Pronoun: 24.0 22.412803532 107% => OK
Preposition: 36.0 30.3222958057 119% => OK
Nominalization: 5.0 5.01324503311 100% => OK
Performance on vocabulary words:
No of characters: 1467.0 1373.03311258 107% => OK
No of words: 306.0 270.72406181 113% => OK
Chars per words: 4.79411764706 5.08290768461 94% => OK
Fourth root words length: 4.18244613648 4.04702891845 103% => OK
Word Length SD: 2.30842280357 2.5805825403 89% => OK
Unique words: 174.0 145.348785872 120% => OK
Unique words percentage: 0.56862745098 0.540411800872 105% => OK
syllable_count: 433.8 419.366225166 103% => OK
avg_syllables_per_word: 1.4 1.55342163355 90% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 3.0 3.25607064018 92% => OK
Article: 8.0 8.23620309051 97% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 4.0 2.5761589404 155% => OK
Performance on sentences:
How many sentences: 12.0 13.0662251656 92% => OK
Sentence length: 25.0 21.2450331126 118% => OK
Sentence length SD: 43.8655616629 49.2860985944 89% => OK
Chars per sentence: 122.25 110.228320801 111% => OK
Words per sentence: 25.5 21.698381199 118% => OK
Discourse Markers: 12.1666666667 7.06452816374 172% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 1.0 4.19205298013 24% => OK
Sentences with positive sentiment : 4.0 4.33554083885 92% => OK
Sentences with negative sentiment : 6.0 4.45695364238 135% => OK
Sentences with neutral sentiment: 2.0 4.27373068433 47% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.434034681689 0.272083759551 160% => OK
Sentence topic coherence: 0.171552295006 0.0996497079465 172% => OK
Sentence topic coherence SD: 0.145712222117 0.0662205650399 220% => The coherence between sentences is low.
Paragraph topic coherence: 0.278299630472 0.162205337803 172% => OK
Paragraph topic coherence SD: 0.11319499336 0.0443174109184 255% => More connections among paragraphs wanted.
Essay readability:
automated_readability_index: 13.9 13.3589403974 104% => OK
flesch_reading_ease: 63.02 53.8541721854 117% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 10.7 11.0289183223 97% => OK
coleman_liau_index: 10.8 12.2367328918 88% => OK
dale_chall_readability_score: 8.28 8.42419426049 98% => OK
difficult_words: 66.0 63.6247240618 104% => OK
linsear_write_formula: 10.5 10.7273730684 98% => OK
gunning_fog: 12.0 10.498013245 114% => OK
text_standard: 11.0 11.2008830022 98% => OK
What are above readability scores?
---------------------
Rates: 80.0 out of 100
Scores by essay e-grader: 24.0 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.