extinction of sea cow
The author of the reading explains The reasons for the extinction of sea cow are not clear and offer three theories about this. In contrast, The lecturer states that we don’t know what causes the extinction of sea cows and challenges each of the theories.
First of all, the author suggests that overhunting of sea cow by native resistant cause extinction, he states that sea cow was valuable food, so native resistant hunt them a lot, However, the Speaker refutes by stating that one sea cow was 9 meters and its weight is about 10 tons. The lecturer mentions the population of the native was low, so hunting one sea cow was feeding them for a month. Therefore, native resistant did not hunt them a lot.
Secondly, the article claims that changing in the ecosystem caused decrease, Kelp. Kelp is the main source of food for sea cow. But the lecturer opposes this point by describing that if the ecosystem is the primary idea for extinction, so other plants and other animals such as whale would be extinct by now. The speaker believes that food shortage did not cause extinction.
Eventually, the author establishes that European traders hunted a lot of sea cow and that is why the sea cow was extinct. The lecturer, on the other hand, explains that the number of sea cows was low before the European traders arrived at their hebitate. He believes that European traders hunted last of them, but is not the primary cause of their extinction.
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Transition Words or Phrases used:
but, first, however, if, second, secondly, so, therefore, in contrast, such as, first of all, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 13.0 10.4613686534 124% => OK
Auxiliary verbs: 1.0 5.04856512141 20% => OK
Conjunction : 7.0 7.30242825607 96% => OK
Relative clauses : 11.0 12.0772626932 91% => OK
Pronoun: 23.0 22.412803532 103% => OK
Preposition: 23.0 30.3222958057 76% => OK
Nominalization: 7.0 5.01324503311 140% => OK
Performance on vocabulary words:
No of characters: 1199.0 1373.03311258 87% => OK
No of words: 253.0 270.72406181 93% => More content wanted.
Chars per words: 4.73913043478 5.08290768461 93% => OK
Fourth root words length: 3.98822939669 4.04702891845 99% => OK
Word Length SD: 2.48183577601 2.5805825403 96% => OK
Unique words: 126.0 145.348785872 87% => More unique words wanted.
Unique words percentage: 0.498023715415 0.540411800872 92% => More unique words wanted or less content wanted.
syllable_count: 357.3 419.366225166 85% => OK
avg_syllables_per_word: 1.4 1.55342163355 90% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 2.0 3.25607064018 61% => OK
Article: 9.0 8.23620309051 109% => OK
Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted.
Conjunction: 2.0 1.51434878587 132% => OK
Preposition: 2.0 2.5761589404 78% => OK
Performance on sentences:
How many sentences: 12.0 13.0662251656 92% => OK
Sentence length: 21.0 21.2450331126 99% => OK
Sentence length SD: 61.266267681 49.2860985944 124% => OK
Chars per sentence: 99.9166666667 110.228320801 91% => OK
Words per sentence: 21.0833333333 21.698381199 97% => OK
Discourse Markers: 9.25 7.06452816374 131% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 0.0 4.19205298013 0% => OK
Sentences with positive sentiment : 3.0 4.33554083885 69% => OK
Sentences with negative sentiment : 3.0 4.45695364238 67% => OK
Sentences with neutral sentiment: 6.0 4.27373068433 140% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.45801170047 0.272083759551 168% => OK
Sentence topic coherence: 0.188548052835 0.0996497079465 189% => OK
Sentence topic coherence SD: 0.17434157248 0.0662205650399 263% => The coherence between sentences is low.
Paragraph topic coherence: 0.312574791417 0.162205337803 193% => OK
Paragraph topic coherence SD: 0.109599802657 0.0443174109184 247% => More connections among paragraphs wanted.
Essay readability:
automated_readability_index: 11.4 13.3589403974 85% => Automated_readability_index is low.
flesch_reading_ease: 67.08 53.8541721854 125% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 9.1 11.0289183223 83% => OK
coleman_liau_index: 10.21 12.2367328918 83% => OK
dale_chall_readability_score: 7.67 8.42419426049 91% => OK
difficult_words: 48.0 63.6247240618 75% => More difficult words wanted.
linsear_write_formula: 13.0 10.7273730684 121% => OK
gunning_fog: 10.4 10.498013245 99% => OK
text_standard: 11.0 11.2008830022 98% => OK
What are above readability scores?
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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.