Sea cows
The reading and listening discuss the extinction of the enormous marine mammal "Steller's sea cow" near Berling Island of Siberia. The article states three theories to describe the reasons for the disappearance of the sea cows- overhunting theory, kelp theory, and traders theory. However, the lecturer refutes the three theories and claims that extinction cause is unknown, and there is a problem with each reason by presenting counter-arguments for each of the assertions.
First and foremost, the passage begins by asserting that the sea cow population would have been enormous before the Siberian dwellers had started to hunt them extensively for their food. This claim is challenged by the lecturer by pointing out that if sea cow had been used as food by Siberian villagers, they would not have needed lots of amounts to result in the extinction. Moreover, he elaborates this point by arguing that the mammal is humongous about 9 meters long, and tons of weight. In contrast, the population of the Siberian village is not too large, so if they had to hunt on the sea cows they wouldn't have diminished.
Next, the professor in the lecture rejects the theory about ecological disturbance by illustrating a couple of facts. First, if something had happened to the supply of the Kelp then other marine species would have affected too and mentioned that in case of the whales there were no signs of their depletion. Second, kelp growth remained consistent, and no food shortage had observed. These points refute the writer's implication that ecological disturbances would have resulted in a scarcity of kelp that was the essential food source for sea cows.
Ultimately, the article wraps its arguments by declaring that there are traces that European fur traders could have caused the depletion, firstly because they possessed weapons to kill, secondly, they were seen to haunt the last sea cow. The speaker in the listening rebuts these points by insisting that the population of sea animals in Berling was already declined before the arrival of Europeans. As their growth was only huge thousand years before 1700, so it is not right to consider European responsible for the problem as something else had caused the extinction other then the reasons mentioned in the reading and listening passages.
Grammar and spelling errors:
Line 3, column 608, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: wouldn't
...f they had to hunt on the sea cows they wouldnt have diminished. Next, the professor i...
^^^^^^^
Line 4, column 408, Rule ID: POSSESIVE_APOSTROPHE[1]
Message: Possible typo: apostrophe is missing. Did you mean 'writers'' or 'writer's'?
Suggestion: writers'; writer's
...e had observed. These points refute the writers implication that ecological disturbance...
^^^^^^^
Line 6, column 571, Rule ID: OTHER_THEN[1]
Message: Did you mean 'other than'?
Suggestion: other than
...omething else had caused the extinction other then the reasons mentioned in the reading an...
^^^^^^^^^^
Line 6, column 577, Rule ID: RATHER_THEN[1]
Message: Did you mean 'than'? 'than' is used for comparisons, 'then' is an expression of time.
Suggestion: than
...ng else had caused the extinction other then the reasons mentioned in the reading an...
^^^^
Transition Words or Phrases used:
but, first, firstly, however, if, moreover, second, secondly, so, then, well, in contrast
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 14.0 10.4613686534 134% => OK
Auxiliary verbs: 5.0 5.04856512141 99% => OK
Conjunction : 9.0 7.30242825607 123% => OK
Relative clauses : 10.0 12.0772626932 83% => OK
Pronoun: 26.0 22.412803532 116% => OK
Preposition: 48.0 30.3222958057 158% => 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: 1939.0 1373.03311258 141% => OK
No of words: 377.0 270.72406181 139% => Less content wanted.
Chars per words: 5.14323607427 5.08290768461 101% => OK
Fourth root words length: 4.4064143971 4.04702891845 109% => OK
Word Length SD: 2.74411099444 2.5805825403 106% => OK
Unique words: 193.0 145.348785872 133% => OK
Unique words percentage: 0.511936339523 0.540411800872 95% => More unique words wanted or less content wanted.
syllable_count: 583.2 419.366225166 139% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 5.0 3.25607064018 154% => OK
Article: 8.0 8.23620309051 97% => OK
Subordination: 2.0 1.25165562914 160% => OK
Conjunction: 4.0 1.51434878587 264% => Less conjunction wanted as sentence beginning.
Preposition: 2.0 2.5761589404 78% => OK
Performance on sentences:
How many sentences: 14.0 13.0662251656 107% => OK
Sentence length: 26.0 21.2450331126 122% => The Avg. Sentence Length is relatively long.
Sentence length SD: 44.6405142242 49.2860985944 91% => OK
Chars per sentence: 138.5 110.228320801 126% => OK
Words per sentence: 26.9285714286 21.698381199 124% => OK
Discourse Markers: 6.35714285714 7.06452816374 90% => 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 : 9.0 4.45695364238 202% => Less negative sentences wanted.
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: 0.290564839464 0.272083759551 107% => OK
Sentence topic coherence: 0.109203428258 0.0996497079465 110% => OK
Sentence topic coherence SD: 0.103338806976 0.0662205650399 156% => OK
Paragraph topic coherence: 0.182734571578 0.162205337803 113% => OK
Paragraph topic coherence SD: 0.0893791696301 0.0443174109184 202% => More connections among paragraphs wanted.
Essay readability:
automated_readability_index: 16.2 13.3589403974 121% => 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: 12.83 12.2367328918 105% => OK
dale_chall_readability_score: 9.03 8.42419426049 107% => OK
difficult_words: 98.0 63.6247240618 154% => OK
linsear_write_formula: 14.0 10.7273730684 131% => OK
gunning_fog: 12.4 10.498013245 118% => OK
text_standard: 13.0 11.2008830022 116% => OK
What are above readability scores?
---------------------
Write the essay in 20 minutes.
Rates: 85.0 out of 100
Scores by essay e-grader: 25.5 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.