Invasive species cause most of the worst problems in local ecosystems. The presence of a new species, particularly one at the top of the food chain, can destroy an ecosystem and cause numerous species to become extinct. One species that is causing numerous problems in America’s waterway is the aquatic zebra mussel.
Native to Russia, the zebra mussel has recently invaded the Great Lakes and many other American lakes and rivers. The mussels attach themselves to the bottoms of boats, a convenient method that lets them travel easily. They also often attach themselves to water pipes. This action results in clogged pipes, some of which are used to bring drinking water to cities. The blocked pipes cost the cities huge amounts of money to unblock. Also, zebra mussels reproduced so rapidly that they often smother the spawning grounds of various fish and other mussels, thereby prohibiting their growth.
Additionally, zebra mussels in North America have very few natural enemies, meaning that it is diffcult to eliminate them once they are established in a river or lake. Likewise, scientists have yet to discover an environmentally-safe way to kill zebra mussels. These two facts help contribute to the extremely rapid expansion of the zebra mussels. Should this expansion not be stopped, zebra mussels will soon be causing problems in virtually all of the country’s waterways.
Invasive species cause most of the worst problems in local ecosystems. The presence of a new species, particularly one at the top of the food chain, can destroy an ecosystem and cause numerous species to become extinct. One species that is causing numerous problems in America’s waterway is the aquatic zebra mussel.
Native to Russia, the zebra mussel has recently invaded the Great Lakes and many other American lakes and rivers. The mussels attach themselves to the bottoms of boats, a convenient method that lets them travel easily. They also often attach themselves to water pipes. This action results in clogged pipes, some of which are used to bring drinking water to cities. The blocked pipes cost the cities huge amounts of money to unblock. Also, zebra mussels reproduced so rapidly that they often smother the spawning grounds of various fish and other mussels, thereby prohibiting their growth.
Additionally, zebra mussels in North America have very few natural enemies, meaning that it is difficult to eliminate them once they are established in a river or lake. Likewise, scientists have yet to discover an environmentally-safe way to kill zebra mussels. These two facts help contribute to the extremely rapid expansion of the zebra mussels. Should this expansion not be stopped, zebra mussels will soon be causing problems in virtually all of the country’s waterways.
Grammar and spelling errors:
Line 5, column 445, Rule ID: ALL_OF_THE[1]
Message: Simply use 'all the'.
Suggestion: all the
...l soon be causing problems in virtually all of the country's waterways.
^^^^^^^^^^
Transition Words or Phrases used:
also, but, if, likewise, so
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 7.0 10.4613686534 67% => OK
Auxiliary verbs: 3.0 5.04856512141 59% => OK
Conjunction : 6.0 7.30242825607 82% => OK
Relative clauses : 5.0 12.0772626932 41% => More relative clauses wanted.
Pronoun: 16.0 22.412803532 71% => OK
Preposition: 27.0 30.3222958057 89% => 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: 1177.0 1373.03311258 86% => OK
No of words: 223.0 270.72406181 82% => More content wanted.
Chars per words: 5.27802690583 5.08290768461 104% => OK
Fourth root words length: 3.86434787811 4.04702891845 95% => OK
Word Length SD: 2.81485789398 2.5805825403 109% => OK
Unique words: 143.0 145.348785872 98% => OK
Unique words percentage: 0.641255605381 0.540411800872 119% => OK
syllable_count: 368.1 419.366225166 88% => OK
avg_syllables_per_word: 1.7 1.55342163355 109% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 3.0 3.25607064018 92% => OK
Article: 5.0 8.23620309051 61% => OK
Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted.
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 0.0 2.5761589404 0% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 13.0 13.0662251656 99% => OK
Sentence length: 17.0 21.2450331126 80% => The Avg. Sentence Length is relatively short.
Sentence length SD: 34.5241532809 49.2860985944 70% => OK
Chars per sentence: 90.5384615385 110.228320801 82% => OK
Words per sentence: 17.1538461538 21.698381199 79% => OK
Discourse Markers: 2.07692307692 7.06452816374 29% => More transition words/phrases wanted.
Paragraphs: 3.0 4.09492273731 73% => More paragraphs wanted.
Language errors: 1.0 4.19205298013 24% => OK
Sentences with positive sentiment : 4.0 4.33554083885 92% => OK
Sentences with negative sentiment : 7.0 4.45695364238 157% => OK
Sentences with neutral sentiment: 2.0 4.27373068433 47% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.315110677139 0.272083759551 116% => OK
Sentence topic coherence: 0.13057174342 0.0996497079465 131% => OK
Sentence topic coherence SD: 0.238551344622 0.0662205650399 360% => The coherence between sentences is low.
Paragraph topic coherence: 0.302057932369 0.162205337803 186% => OK
Paragraph topic coherence SD: 0.395096401129 0.0443174109184 892% => More connections among paragraphs wanted.
Essay readability:
automated_readability_index: 12.0 13.3589403974 90% => Automated_readability_index is low.
flesch_reading_ease: 45.76 53.8541721854 85% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 11.1 11.0289183223 101% => OK
coleman_liau_index: 13.05 12.2367328918 107% => OK
dale_chall_readability_score: 9.58 8.42419426049 114% => OK
difficult_words: 72.0 63.6247240618 113% => OK
linsear_write_formula: 7.0 10.7273730684 65% => OK
gunning_fog: 8.8 10.498013245 84% => OK
text_standard: 9.0 11.2008830022 80% => OK
What are above readability scores?
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Minimum four paragraphs wanted. The correct pattern:
para 1: introduction
para 2: doubt 1
para 3: doubt 2
para 4: doubt 3
Less contents wanted from the reading passages(25%), more content wanted from the lecture (75%).
Don't need a conclusion paragraph.
Read sample essays from ETS:
http://www.testbig.com/users/toeflwritingmaster
Rates: 71.6666666667 out of 100
Scores by essay e-grader: 21.5 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.