Recently, there has been a debate about the causes of steller's sea cow extinction, the author in the reading passage suggest three theories had been the cause of this extinction, but the professor refutes all of them, he tries to convince their students of the misleading of these theories.
First of all, the issue about over hunting, the professor contends that the sea cows were a massive animals, they were about nine meters in length and hundred tons in weight,so one of them may feed a small village, the Siberian population is too small at that time, so one sea cow may be enough for a lot of them. By knowing this fact, it is less likely for the hunting to be the cause of sea cow extinction, as the author assumes.
Second, the theory of decrease the food supply for the sea cow because of ecological disturbance, which lead to decrease in kelp(sea plant that the sea cow relied on it), the professor claims that if severe ecological disruption had happened, that must lead to decline in other animals population, like whale population, which didn't happen to any animals. So the shortage in food theory which has been adopted by the author in the reading passage, practically doesn't true.
Finally, the professor refutes the theory that the arriving of fur trader was the cause of sea cow extinction, he says, the sea cow population was already declined a hundred years before the fur trader arriving ,if we know the cause of it's decline at that time, then it must be the real cause of their extinction. By this, the professor knocks down the third theory in the reading passage.
In sum, the professor explains why he does not believe in these theories about the sea cow extinction, then he gives explanations for each point raised by the author in the reading passage.
Grammar and spelling errors:
Line 1, column 1, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
First of all, the issue about over hunti...
^^
Line 1, column 103, Rule ID: A_PLURAL[2]
Message: Don't use indefinite articles with plural words. Did you mean 'animal'?
Suggestion: animal
...ntends that the sea cows were a massive animals, they were about nine meters in length ...
^^^^^^^
Line 1, column 154, Rule ID: NODT_DOZEN[1]
Message: Use simply: 'a hundred'.
Suggestion: a hundred
...ey were about nine meters in length and hundred tons in weight,so one of them may feed ...
^^^^^^^
Line 1, column 176, Rule ID: COMMA_PARENTHESIS_WHITESPACE
Message: Put a space after the comma
Suggestion: , so
...ers in length and hundred tons in weight,so one of them may feed a small village, ...
^^^
Line 1, column 208, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...n weight,so one of them may feed a small village, the Siberian population is too ...
^^
Line 2, column 1, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...cow extinction, as the author assumes. Second, the theory of decrease the food ...
^^^^^^
Line 2, column 283, Rule ID: POSSESIVE_APOSTROPHE[2]
Message: Possible typo: apostrophe is missing. Did you mean 'animals'' or 'animal's'?
Suggestion: animals'; animal's
...ned, that must lead to decline in other animals population, like whale population, whi...
^^^^^^^
Line 2, column 290, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...at must lead to decline in other animals population, like whale population, which...
^^
Line 2, column 333, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: didn't
...opulation, like whale population, which didnt happen to any animals. So the shortage ...
^^^^^
Line 2, column 465, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: doesn't
...hor in the reading passage, practically doesnt true. Finally, the professor ref...
^^^^^^
Line 3, column 1, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...ding passage, practically doesnt true. Finally, the professor refutes the theor...
^^^^^^
Line 3, column 53, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...y, the professor refutes the theory that the arriving of fur trader was the cause...
^^
Line 3, column 218, Rule ID: COMMA_PARENTHESIS_WHITESPACE
Message: Put a space after the comma, but not before the comma
Suggestion: ,
...red years before the fur trader arriving ,if we know the cause of its decline at ...
^^
Line 3, column 230, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...fore the fur trader arriving ,if we know the cause of its decline at that time, t...
^^
Line 3, column 278, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...use of its decline at that time, then it must be the real cause of their extincti...
^^
Line 4, column 1, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...e third theory in the reading passage. In sum, the professor explains why he do...
^^^^^
Transition Words or Phrases used:
finally, first, if, may, second, so, then, third, first of all
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 : 1.0 7.30242825607 14% => More conjunction wanted.
Relative clauses : 10.0 12.0772626932 83% => OK
Pronoun: 22.0 22.412803532 98% => OK
Preposition: 38.0 30.3222958057 125% => OK
Nominalization: 10.0 5.01324503311 199% => OK
Performance on vocabulary words:
No of characters: 1225.0 1373.03311258 89% => OK
No of words: 264.0 270.72406181 98% => OK
Chars per words: 4.64015151515 5.08290768461 91% => OK
Fourth root words length: 4.03089032464 4.04702891845 100% => OK
Word Length SD: 2.46056769171 2.5805825403 95% => OK
Unique words: 138.0 145.348785872 95% => More unique words wanted.
Unique words percentage: 0.522727272727 0.540411800872 97% => OK
syllable_count: 377.1 419.366225166 90% => OK
avg_syllables_per_word: 1.4 1.55342163355 90% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 4.0 3.25607064018 123% => OK
Interrogative: 0.0 0.116997792494 0% => OK
Article: 9.0 8.23620309051 109% => OK
Subordination: 2.0 1.25165562914 160% => OK
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 4.0 2.5761589404 155% => OK
Performance on sentences:
How many sentences: 7.0 13.0662251656 54% => 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: 37.0 21.2450331126 174% => The Avg. Sentence Length is relatively long.
Sentence length SD: 106.181592624 49.2860985944 215% => The lengths of sentences changed so frequently.
Chars per sentence: 175.0 110.228320801 159% => OK
Words per sentence: 37.7142857143 21.698381199 174% => OK
Discourse Markers: 8.85714285714 7.06452816374 125% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 16.0 4.19205298013 382% => Less language errors wanted.
Sentences with positive sentiment : 0.0 4.33554083885 0% => More positive sentences wanted.
Sentences with negative sentiment : 2.0 4.45695364238 45% => More negative sentences wanted.
Sentences with neutral sentiment: 5.0 4.27373068433 117% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.359784024058 0.272083759551 132% => OK
Sentence topic coherence: 0.16922982395 0.0996497079465 170% => OK
Sentence topic coherence SD: 0.0592289666563 0.0662205650399 89% => OK
Paragraph topic coherence: 0.212909923841 0.162205337803 131% => OK
Paragraph topic coherence SD: 0.0561920442893 0.0443174109184 127% => OK
Essay readability:
automated_readability_index: 19.3 13.3589403974 144% => OK
flesch_reading_ease: 50.84 53.8541721854 94% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 15.4 11.0289183223 140% => OK
coleman_liau_index: 10.22 12.2367328918 84% => OK
dale_chall_readability_score: 8.16 8.42419426049 97% => OK
difficult_words: 45.0 63.6247240618 71% => More difficult words wanted.
linsear_write_formula: 17.5 10.7273730684 163% => OK
gunning_fog: 16.8 10.498013245 160% => OK
text_standard: 9.0 11.2008830022 80% => OK
What are above readability scores?
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Rates: 76.6666666667 out of 100
Scores by essay e-grader: 23.0 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.