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 massive animals which could grow up to 9 meters long and weigh over 10 tons. And a couple of sea cows could feed a small Siberian for month. Because the population of native Siberians was not large, they did not need to hunt a lot of sea cows. Therefore, the native residents should not be held accountable for 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: 11.0 5.04856512141 218% => Less auxiliary verb wanted.
Conjunction : 5.0 7.30242825607 68% => OK
Relative clauses : 12.0 12.0772626932 99% => OK
Pronoun: 15.0 22.412803532 67% => OK
Preposition: 43.0 30.3222958057 142% => OK
Nominalization: 10.0 5.01324503311 199% => OK
Performance on vocabulary words:
No of characters: 1574.0 1373.03311258 115% => OK
No of words: 332.0 270.72406181 123% => OK
Chars per words: 4.74096385542 5.08290768461 93% => OK
Fourth root words length: 4.2685907696 4.04702891845 105% => OK
Word Length SD: 2.37615287434 2.5805825403 92% => OK
Unique words: 167.0 145.348785872 115% => OK
Unique words percentage: 0.503012048193 0.540411800872 93% => More unique words wanted or less content wanted.
syllable_count: 478.8 419.366225166 114% => 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: 8.0 8.23620309051 97% => OK
Subordination: 2.0 1.25165562914 160% => OK
Conjunction: 1.0 1.51434878587 66% => OK
Preposition: 5.0 2.5761589404 194% => OK
Performance on sentences:
How many sentences: 13.0 13.0662251656 99% => OK
Sentence length: 25.0 21.2450331126 118% => OK
Sentence length SD: 60.4023002031 49.2860985944 123% => OK
Chars per sentence: 121.076923077 110.228320801 110% => OK
Words per sentence: 25.5384615385 21.698381199 118% => OK
Discourse Markers: 9.38461538462 7.06452816374 133% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 0.0 4.19205298013 0% => OK
Sentences with positive sentiment : 2.0 4.33554083885 46% => More positive sentences wanted.
Sentences with negative sentiment : 6.0 4.45695364238 135% => OK
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: 0.288572853329 0.272083759551 106% => OK
Sentence topic coherence: 0.10436323624 0.0996497079465 105% => OK
Sentence topic coherence SD: 0.052594227074 0.0662205650399 79% => OK
Paragraph topic coherence: 0.178768073819 0.162205337803 110% => OK
Paragraph topic coherence SD: 0.0259586229573 0.0443174109184 59% => OK
Essay readability:
automated_readability_index: 13.7 13.3589403974 103% => OK
flesch_reading_ease: 63.02 53.8541721854 117% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 10.7 11.0289183223 97% => OK
coleman_liau_index: 10.51 12.2367328918 86% => OK
dale_chall_readability_score: 7.73 8.42419426049 92% => OK
difficult_words: 60.0 63.6247240618 94% => OK
linsear_write_formula: 17.5 10.7273730684 163% => OK
gunning_fog: 12.0 10.498013245 114% => OK
text_standard: 11.0 11.2008830022 98% => OK
What are above readability scores?
---------------------
Write the essay in 20 minutes.
Rates: 80.0 out of 100
Scores by essay e-grader: 24.0 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.