Both the reading and the lecture discuss three theories about the main causes of Steller's sea cow extinction. While the author claims that these theories contribute to the main causes of this event, the professor disagrees and provides some pieces of evidence to state that these theories would not be the major reason of this phenomenon.
First, the reading says that overhunting of the sea cows by native Siberian people could be the key factor of the extinction of this animal. However, the lecturer disagrees. According to the lecturer, each sea cow was so big so that it could supply enough food resource for the whole village for a long period of time, so it was necessary for the residents to kill a large number of this animal to gain sufficient food supply.
Second, according to the reading passage, some ecosystem changes occurred near Beriling Island which resulted in the reduction of kelp, which was the main food of sea cow. As a result, sea cows encountered with the deficient food supply and subsequently their population decreased because of lack of food. Conversely, the lecturer disproves this point. He points out that if that change in environment was too severe that it could led to the destruction of kelp plant, we must have other evidences of the extinction of other marine animals such as whales. However, there is not any evidence of such extinction; therefore, this hypothesis is not credited either.
Third, the reading passage points out that asserts the sea cows might be haunted by fur traders in order to obtain their fur. It refers to the chronological evidences that shows that the number of sea cows gradually diminished after the settlement of these trader. On the other hand, the professor rejects this hypothesis and he argues that it seems that something caused the reduction of sea cows long before the time when fur traders inhabit on the island because there are some evidences that indicate that there was a small number of sea cows remained when the traders first came to the island.
Grammar and spelling errors:
Line 3, column 304, Rule ID: PERIOD_OF_TIME[1]
Message: Use simply 'period'.
Suggestion: period
...source for the whole village for a long period of time, so it was necessary for the residents ...
^^^^^^^^^^^^^^
Line 3, column 366, Rule ID: LARGE_NUMBER_OF[1]
Message: Specify a number, remove phrase, or simply use 'many' or 'numerous'
Suggestion: many; numerous
...was necessary for the residents to kill a large number of this animal to gain sufficient food sup...
^^^^^^^^^^^^^^^^^
Line 5, column 432, Rule ID: DID_BASEFORM[1]
Message: The verb 'could' requires the base form of the verb: 'lead'
Suggestion: lead
...nvironment was too severe that it could led to the destruction of kelp plant, we mu...
^^^
Line 7, column 521, Rule ID: SMALL_NUMBER_OF[1]
Message: Specify a number, remove phrase, use 'a few', or use 'some'
Suggestion: a few; some
... evidences that indicate that there was a small number of sea cows remained when the traders firs...
^^^^^^^^^^^^^^^^^
Transition Words or Phrases used:
but, conversely, first, however, if, second, so, therefore, third, while, as to, such as, as a result, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 11.0 10.4613686534 105% => OK
Auxiliary verbs: 6.0 5.04856512141 119% => OK
Conjunction : 4.0 7.30242825607 55% => More conjunction wanted.
Relative clauses : 18.0 12.0772626932 149% => OK
Pronoun: 34.0 22.412803532 152% => Less pronouns wanted
Preposition: 45.0 30.3222958057 148% => OK
Nominalization: 12.0 5.01324503311 239% => Less nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1696.0 1373.03311258 124% => OK
No of words: 345.0 270.72406181 127% => OK
Chars per words: 4.91594202899 5.08290768461 97% => OK
Fourth root words length: 4.3097767484 4.04702891845 106% => OK
Word Length SD: 2.5319068713 2.5805825403 98% => OK
Unique words: 175.0 145.348785872 120% => OK
Unique words percentage: 0.507246376812 0.540411800872 94% => More unique words wanted or less content wanted.
syllable_count: 518.4 419.366225166 124% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 4.0 3.25607064018 123% => OK
Interrogative: 0.0 0.116997792494 0% => OK
Article: 6.0 8.23620309051 73% => OK
Subordination: 2.0 1.25165562914 160% => OK
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 3.0 2.5761589404 116% => OK
Performance on sentences:
How many sentences: 13.0 13.0662251656 99% => OK
Sentence length: 26.0 21.2450331126 122% => The Avg. Sentence Length is relatively long.
Sentence length SD: 79.6197323228 49.2860985944 162% => OK
Chars per sentence: 130.461538462 110.228320801 118% => OK
Words per sentence: 26.5384615385 21.698381199 122% => OK
Discourse Markers: 9.23076923077 7.06452816374 131% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 4.0 4.19205298013 95% => OK
Sentences with positive sentiment : 1.0 4.33554083885 23% => More positive sentences wanted.
Sentences with negative sentiment : 8.0 4.45695364238 179% => OK
Sentences with neutral sentiment: 4.0 4.27373068433 94% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.0607095164 0.272083759551 22% => The similarity between the topic and the content is low.
Sentence topic coherence: 0.0239394113026 0.0996497079465 24% => Sentence topic similarity is low.
Sentence topic coherence SD: 0.0154576815562 0.0662205650399 23% => Sentences are similar to each other.
Paragraph topic coherence: 0.0427260214892 0.162205337803 26% => Maybe some paragraphs are off the topic.
Paragraph topic coherence SD: 0.0133328268779 0.0443174109184 30% => 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: 15.0 13.3589403974 112% => OK
flesch_reading_ease: 53.55 53.8541721854 99% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 12.3 11.0289183223 112% => OK
coleman_liau_index: 11.55 12.2367328918 94% => OK
dale_chall_readability_score: 8.59 8.42419426049 102% => OK
difficult_words: 80.0 63.6247240618 126% => OK
linsear_write_formula: 10.5 10.7273730684 98% => OK
gunning_fog: 12.4 10.498013245 118% => OK
text_standard: 12.0 11.2008830022 107% => OK
What are above readability scores?
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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
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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.