summarize the points made in the lecture, being sure to explain how they challenge the points that what might have caused the extinction of the sea cows mentioned in the reading passage
In the reading passage, the author discusses three theories about the main cause of the sea cow's extinction around Bring Island, while the lecture claims that what the passage state is not convincing and disputes those ideas presented in the passage with several proofs.
Firstly, according to the reading passage, it is suggested that the sea cows may have been overhunted by groups of native Siverian people since the sea cows were a good source of food in a harsh environment for native people. In contrast, the professor argues in the lecture that the sea cows were mass animals that had enormous bodies so that a part of a sea cow would provide native citizens with abundant food. And the population of Siberian people was pretty small at that time, they did not need to kill a lot of sea cows for food. Therefore, the native people were unlike the reason that led to the extinction of the sea cows.
In addition, the statement in the reading material indicates that the sea cow population may have become extinct because of ecosystems disturbances that caused a decline in their main source of food, kelp. On the contrary, the professor points out that if the ecosystem had happened severe disturbances, there were other animals such as kelp would die. Scientists already found whales which lived at the same time had kept growing fine. Hence, the kelp could not largely perish and the sea cows could not lack of food.
Finally, the author of the reading claims that the main cause of extinction of the sea cows could have been European fur traders who came to the island after 1742. However, the speaker argues that the extinction of the sea cows happened before the fur traders got to the island because the population of the sea cows had been small before they arrived. There must be one thing happen before the traders went to that place and it mainly caused the sea cows disappeared.
Transition Words or Phrases used:
finally, first, firstly, hence, however, if, may, so, therefore, while, in addition, in contrast, such as, on the contrary
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 11.0 10.4613686534 105% => OK
Auxiliary verbs: 9.0 5.04856512141 178% => OK
Conjunction : 4.0 7.30242825607 55% => More conjunction wanted.
Relative clauses : 15.0 12.0772626932 124% => OK
Pronoun: 19.0 22.412803532 85% => OK
Preposition: 43.0 30.3222958057 142% => OK
Nominalization: 10.0 5.01324503311 199% => OK
Performance on vocabulary words:
No of characters: 1567.0 1373.03311258 114% => OK
No of words: 331.0 270.72406181 122% => OK
Chars per words: 4.73413897281 5.08290768461 93% => OK
Fourth root words length: 4.26537283232 4.04702891845 105% => OK
Word Length SD: 2.33669346779 2.5805825403 91% => OK
Unique words: 161.0 145.348785872 111% => OK
Unique words percentage: 0.486404833837 0.540411800872 90% => More unique words wanted or less content wanted.
syllable_count: 481.5 419.366225166 115% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 2.0 3.25607064018 61% => OK
Article: 8.0 8.23620309051 97% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 1.0 1.51434878587 66% => OK
Preposition: 5.0 2.5761589404 194% => OK
Performance on sentences:
How many sentences: 12.0 13.0662251656 92% => OK
Sentence length: 27.0 21.2450331126 127% => The Avg. Sentence Length is relatively long.
Sentence length SD: 57.589543804 49.2860985944 117% => OK
Chars per sentence: 130.583333333 110.228320801 118% => OK
Words per sentence: 27.5833333333 21.698381199 127% => OK
Discourse Markers: 10.1666666667 7.06452816374 144% => 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 : 6.0 4.45695364238 135% => OK
Sentences with neutral sentiment: 3.0 4.27373068433 70% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.283609433873 0.272083759551 104% => OK
Sentence topic coherence: 0.108647226522 0.0996497079465 109% => OK
Sentence topic coherence SD: 0.0533130732684 0.0662205650399 81% => OK
Paragraph topic coherence: 0.1768633296 0.162205337803 109% => OK
Paragraph topic coherence SD: 0.0267568508053 0.0443174109184 60% => OK
Essay readability:
automated_readability_index: 14.6 13.3589403974 109% => OK
flesch_reading_ease: 52.53 53.8541721854 98% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 12.6 11.0289183223 114% => OK
coleman_liau_index: 10.45 12.2367328918 85% => OK
dale_chall_readability_score: 7.74 8.42419426049 92% => OK
difficult_words: 58.0 63.6247240618 91% => OK
linsear_write_formula: 17.5 10.7273730684 163% => OK
gunning_fog: 12.8 10.498013245 122% => OK
text_standard: 13.0 11.2008830022 116% => OK
What are above readability scores?
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Write the essay in 20 minutes.
Rates: 73.3333333333 out of 100
Scores by essay e-grader: 22.0 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.