Starting in the 1960s and continuing until the 1980s, sailors in Russian submarines patrolling the North Atlantic and Arctic Ocean would occasionally hear strange sounds.
As mentioned in the lecture, the quackers phenomena is still a mystery, and its source is still uncovered.
There is much debate on the causes of quackers mentioned in the reading, and here are some of the problems, as the lecturer elaborated.
Based on the reading, the first theory suggests that quackers are the sound of male and female orca whales when they call for each other. However, orca whales being the source of the sounds is highly unlikely because orca whales stay near the ocean surface. Nevertheless, the submarine detected the sound very deep in the ocean, and even if orca whales made it, the submarine's sonar should have detected the whales.
The second idea is that the sounds were caused by a giant squid, which can be plausible. However, a strange phenomenon makes it debatable. The submarines detected the sound between the 1960s and continuing until the 1980s. After that, the sound stopped, but we know that the habitat of the squids has not changed, and there is no reason for the quackers to stop suddenly.
The third theory explained that the submarines were picking up other military's stray sounds. However, the source of the sound seemed to be moving with great speed and agility. Even with the technology nowadays, submarines can not move around and change direction very promptly; besides, submarines have engine noises that were not detected alongside the quackers, and submarines do not have such a quiet engine be undetectable.
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Grammar and spelling errors:
Line 2, column 87, Rule ID: SOME_OF_THE[1]
Message: Simply use 'some'.
Suggestion: some
... mentioned in the reading, and here are some of the problems, as the lecturer elaborated. ...
^^^^^^^^^^^
Line 3, column 367, Rule ID: POSSESIVE_APOSTROPHE[1]
Message: Possible typo: apostrophe is missing. Did you mean 'submarines'' or 'submarine's'?
Suggestion: submarines'; submarine's
...n, and even if orca whales made it, the submarines sonar should have detected the whales. ...
^^^^^^^^^^
Transition Words or Phrases used:
besides, but, first, however, if, nevertheless, second, so, still, third
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 15.0 10.4613686534 143% => OK
Auxiliary verbs: 3.0 5.04856512141 59% => OK
Conjunction : 10.0 7.30242825607 137% => OK
Relative clauses : 8.0 12.0772626932 66% => More relative clauses wanted.
Pronoun: 11.0 22.412803532 49% => OK
Preposition: 23.0 30.3222958057 76% => OK
Nominalization: 1.0 5.01324503311 20% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1224.0 1373.03311258 89% => OK
No of words: 245.0 270.72406181 90% => More content wanted.
Chars per words: 4.99591836735 5.08290768461 98% => OK
Fourth root words length: 3.95632099841 4.04702891845 98% => OK
Word Length SD: 2.50917184683 2.5805825403 97% => OK
Unique words: 136.0 145.348785872 94% => More unique words wanted.
Unique words percentage: 0.555102040816 0.540411800872 103% => OK
syllable_count: 379.8 419.366225166 91% => OK
avg_syllables_per_word: 1.6 1.55342163355 103% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 0.0 3.25607064018 0% => OK
Article: 10.0 8.23620309051 121% => OK
Subordination: 3.0 1.25165562914 240% => Less adverbial clause wanted.
Conjunction: 6.0 1.51434878587 396% => Less conjunction wanted as sentence beginning.
Preposition: 1.0 2.5761589404 39% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 12.0 13.0662251656 92% => OK
Sentence length: 20.0 21.2450331126 94% => OK
Sentence length SD: 49.7350619673 49.2860985944 101% => OK
Chars per sentence: 102.0 110.228320801 93% => OK
Words per sentence: 20.4166666667 21.698381199 94% => OK
Discourse Markers: 6.0 7.06452816374 85% => OK
Paragraphs: 5.0 4.09492273731 122% => OK
Language errors: 2.0 4.19205298013 48% => OK
Sentences with positive sentiment : 1.0 4.33554083885 23% => More positive sentences wanted.
Sentences with negative sentiment : 3.0 4.45695364238 67% => OK
Sentences with neutral sentiment: 8.0 4.27373068433 187% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.161828005815 0.272083759551 59% => OK
Sentence topic coherence: 0.067934666361 0.0996497079465 68% => OK
Sentence topic coherence SD: 0.0894820062368 0.0662205650399 135% => OK
Paragraph topic coherence: 0.0729216110251 0.162205337803 45% => OK
Paragraph topic coherence SD: 0.0707084474905 0.0443174109184 160% => OK
Essay readability:
automated_readability_index: 12.3 13.3589403974 92% => Automated_readability_index is low.
flesch_reading_ease: 51.18 53.8541721854 95% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 11.1 11.0289183223 101% => OK
coleman_liau_index: 11.72 12.2367328918 96% => OK
dale_chall_readability_score: 8.17 8.42419426049 97% => OK
difficult_words: 55.0 63.6247240618 86% => OK
linsear_write_formula: 11.0 10.7273730684 103% => OK
gunning_fog: 10.0 10.498013245 95% => OK
text_standard: 12.0 11.2008830022 107% => OK
What are above readability scores?
---------------------
Rates: 83.3333333333 out of 100
Scores by essay e-grader: 25.0 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.