Sea cows was a huge marine mammals which lived in the water around Being Islands. Sea cows became extinct in 1768. The author mentions three reasons that caused decline in population of the sea cows. But the lecturer thinks that there are some problems with the reasons that author mentioned and they don't know the exact reason that caused extinction of sea cows.
First, the author thinks that overhunting by native people caused extinction of sea cows. Because, sea cow is a great food source in harsh enviroments. But the lecturer mentions that sea cows was a massive creature and it could feed one village of Bering Island for a month. Hence, It is impossible that overhunting caused extinction of this mammal.
Second, the author thinks that some ecosystems disturbances may caused a decline in the main food source of sea cows. But the lecturer thinks that ecosystems disturbance would affect other animals like whales which there is no reports about decline of population in other mammals.
Finally, the author mentions European fur trade may cause extinction of sea cows. Because European fur traders had weapons that allowed them to kill huge animals. But the lecturer mentions that sea cow's extinction happened hundred of years before European arrived in Bering Island and other reasons may caused extinction of sea cows.
Grammar and spelling errors:
Line 1, column 28, Rule ID: A_PLURAL[2]
Message: Don't use indefinite articles with plural words. Did you mean 'mammal'?
Suggestion: mammal
Sea cows was a huge marine mammals which lived in the water around Being I...
^^^^^^^
Line 1, column 302, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: don't
... reasons that author mentioned and they dont know the exact reason that caused extin...
^^^^
Line 2, column 1, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...on that caused extinction of sea cows. First, the author thinks that overhuntin...
^^
Line 2, column 92, Rule ID: SENTENCE_FRAGMENT[1]
Message: “Because” 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.
...e people caused extinction of sea cows. Because, sea cow is a great food source in hars...
^^^^^^^
Line 3, column 1, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...ting caused extinction of this mammal. Second, the author thinks that some ecos...
^^
Line 3, column 149, Rule ID: POSSESIVE_APOSTROPHE[1]
Message: Possible typo: apostrophe is missing. Did you mean 'ecosystems'' or 'ecosystem's'?
Suggestion: ecosystems'; ecosystem's
... sea cows. But the lecturer thinks that ecosystems disturbance would affect other animals ...
^^^^^^^^^^
Line 3, column 217, Rule ID: THERE_S_MANY[4]
Message: Did you mean 'there are no reports'?
Suggestion: there are no reports
... affect other animals like whales which there is no reports about decline of population in other ma...
^^^^^^^^^^^^^^^^^^^
Line 4, column 1, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...ecline of population in other mammals. Finally, the author mentions European fu...
^^
Line 4, column 84, Rule ID: SENTENCE_FRAGMENT[1]
Message: “Because” 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.
...trade may cause extinction of sea cows. Because European fur traders had weapons that a...
^^^^^^^
Line 4, column 200, Rule ID: POSSESIVE_APOSTROPHE[1]
Message: Possible typo: apostrophe is missing. Did you mean 'cows'' or 'cow's'?
Suggestion: cows'; cow's
...als. But the lecturer mentions that sea cows extinction happened hundred of years be...
^^^^
Line 4, column 225, Rule ID: NODT_DOZEN[1]
Message: Use simply: 'a hundred'.
Suggestion: a hundred
...tions that sea cows extinction happened hundred of years before European arrived in Ber...
^^^^^^^
Transition Words or Phrases used:
but, finally, first, hence, may, second, so
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 7.0 10.4613686534 67% => OK
Auxiliary verbs: 5.0 5.04856512141 99% => OK
Conjunction : 7.0 7.30242825607 96% => OK
Relative clauses : 13.0 12.0772626932 108% => OK
Pronoun: 16.0 22.412803532 71% => OK
Preposition: 24.0 30.3222958057 79% => OK
Nominalization: 9.0 5.01324503311 180% => OK
Performance on vocabulary words:
No of characters: 1115.0 1373.03311258 81% => OK
No of words: 220.0 270.72406181 81% => More content wanted.
Chars per words: 5.06818181818 5.08290768461 100% => OK
Fourth root words length: 3.85128510684 4.04702891845 95% => OK
Word Length SD: 2.42021018826 2.5805825403 94% => OK
Unique words: 107.0 145.348785872 74% => More unique words wanted.
Unique words percentage: 0.486363636364 0.540411800872 90% => More unique words wanted or less content wanted.
syllable_count: 334.8 419.366225166 80% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 1.0 3.25607064018 31% => OK
Article: 4.0 8.23620309051 49% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 4.0 1.51434878587 264% => Less conjunction wanted as sentence beginning.
Preposition: 0.0 2.5761589404 0% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 13.0 13.0662251656 99% => OK
Sentence length: 16.0 21.2450331126 75% => The Avg. Sentence Length is relatively short.
Sentence length SD: 40.9373890531 49.2860985944 83% => OK
Chars per sentence: 85.7692307692 110.228320801 78% => OK
Words per sentence: 16.9230769231 21.698381199 78% => OK
Discourse Markers: 3.30769230769 7.06452816374 47% => More transition words/phrases wanted.
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 11.0 4.19205298013 262% => Less language errors wanted.
Sentences with positive sentiment : 2.0 4.33554083885 46% => More positive sentences wanted.
Sentences with negative sentiment : 4.0 4.45695364238 90% => OK
Sentences with neutral sentiment: 7.0 4.27373068433 164% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.52765245385 0.272083759551 194% => OK
Sentence topic coherence: 0.238533467256 0.0996497079465 239% => Sentence topic similarity is high.
Sentence topic coherence SD: 0.0977210704721 0.0662205650399 148% => OK
Paragraph topic coherence: 0.356836177959 0.162205337803 220% => OK
Paragraph topic coherence SD: 0.0995976182435 0.0443174109184 225% => More connections among paragraphs wanted.
Essay readability:
automated_readability_index: 10.9 13.3589403974 82% => Automated_readability_index is low.
flesch_reading_ease: 63.7 53.8541721854 118% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 8.4 11.0289183223 76% => OK
coleman_liau_index: 11.83 12.2367328918 97% => OK
dale_chall_readability_score: 7.3 8.42419426049 87% => OK
difficult_words: 40.0 63.6247240618 63% => More difficult words wanted.
linsear_write_formula: 6.5 10.7273730684 61% => OK
gunning_fog: 8.4 10.498013245 80% => OK
text_standard: 8.0 11.2008830022 71% => OK
What are above readability scores?
---------------------
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.