Asteroids are large space objects made of rock and ice. There are hundreds of thousands of asteroids in our solar system. Though we often hear ideas about establishing colonies of humans to live and work on our Moon or our neighboring planet, Mars, some think that sending people to an asteroid would actually be the best colonization option for a number of reasons. Low Gravity To begin with, asteroids are often much smaller than planets, so they have lower gravity. When landing a spaceship, the craft would not be pulled as strongly or as forcefully toward the asteroid's surface, making the landing safer than landing on the Moon or Mars; it would also allow a spacecraft to carry much more equipment needed to set up the colony. It would also be easier for the spacecraft to take off again, so the spaceship would need to carry considerably less fuel for the trip back to Earth. Mining Valuable Metals Next some asteroids are rich in valuable elements and precious metals that are relatively rare on Earth, such as gold and platinum. An asteroid colony would be extremely profitable and a good source of these raw materials. The colonists or businesses sponsoring them could more than pay for the cost of their support by mining minerals and sending them back to Earth. Easy to Reach Finally, asteroids are a good option for colonization because some of them would be very easy to reach. There are a number of asteroids that periodically come within or near Earth's orbit Some of them actually get closer to Earth than our Moon. So these asteroids would be much easier and more affordable to get to and get back from than a planet like Mars, which would require a two-year trip in each direction.
In this set of materials, the reading passage proposes to establish colonies of human on asteroids and provides some reasons. However, the lecturer believes that it is not very practical and all reasons have serious downsides. So, he explains some evidence to refute them all.
First of all, the author of the article asserts that low gravity makes life easier in asteroids. In contrast, the professor argues that there are certain risks such as health problems. Even after short term living in low gravity area, bone density and muscle mass would decrease. For long time, the consequences are more dangerous. So, human will not survive if settle in asteroids.
Furthermore, it is mentioned in the passage that mining valuable metals is profitable and economically cover the cost of of travel. On the contrary, the professor contends that it is not the whole picture and the cost of transportation of metals is very expensive which will not be reasonable. On the other hand, after increasing the supply the market price would go down and the price will not stay high enough to be profitable. Hence, nobody will invest for this project.
Finally, the reading claims that it is easy to reach the destination since asteroids are near to earth. Conversely, the lecturer states that even though it is easy to go there, it is not easy to return from. Asteroids have unusual orbits that force them to go distance from earth which is a challenge after some time. It would make it difficult for human to travel back to home planet and costly as well. In fact, people disagree to have one way trip to space.
- Like many creatures, humpback whales migrate long distances for feeding and mating purposes. How animals manage to migrate long distances is often puzzling. In the case of humpback whales, we may have found the answer: they may be navigating by the stars, 80
- Do you agree or disagree with the following statement? “Television has destroyed communication among friends and family” 80
- The Salton Sea in California is actually a salty inland lake. The level of salt in the lake's water—what scientists call its salinity—has been increasing steadily for years because the lake's water is evaporating faster than it is being repl 75
- Do you agree or disagree with the following statements Because people are busy doing so many different things they do very few things well Use specific reasons and examples to support your answer 70
- Do you agree or disagree with the following statement Universities should require every graduating student to take public speaking courses Give specific examples and details to support your answer 90
Grammar and spelling errors:
Line 5, column 119, Rule ID: ENGLISH_WORD_REPEAT_RULE
Message: Possible typo: you repeated a word
Suggestion: of
...fitable and economically cover the cost of of travel. On the contrary, the professor ...
^^^^^^
Line 5, column 121, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...table and economically cover the cost of of travel. On the contrary, the professo...
^^
Transition Words or Phrases used:
conversely, finally, first, furthermore, hence, however, if, so, well, in contrast, in fact, such as, first of all, on the contrary, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 14.0 10.4613686534 134% => OK
Auxiliary verbs: 7.0 5.04856512141 139% => OK
Conjunction : 7.0 7.30242825607 96% => OK
Relative clauses : 10.0 12.0772626932 83% => OK
Pronoun: 21.0 22.412803532 94% => OK
Preposition: 37.0 30.3222958057 122% => OK
Nominalization: 4.0 5.01324503311 80% => OK
Performance on vocabulary words:
No of characters: 1331.0 1373.03311258 97% => OK
No of words: 275.0 270.72406181 102% => OK
Chars per words: 4.84 5.08290768461 95% => OK
Fourth root words length: 4.07223819929 4.04702891845 101% => OK
Word Length SD: 2.53455849742 2.5805825403 98% => OK
Unique words: 156.0 145.348785872 107% => OK
Unique words percentage: 0.567272727273 0.540411800872 105% => OK
syllable_count: 418.5 419.366225166 100% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 4.0 3.25607064018 123% => OK
Article: 8.0 8.23620309051 97% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 6.0 2.5761589404 233% => Less preposition wanted as sentence beginnings.
Performance on sentences:
How many sentences: 17.0 13.0662251656 130% => OK
Sentence length: 16.0 21.2450331126 75% => The Avg. Sentence Length is relatively short.
Sentence length SD: 33.4263638362 49.2860985944 68% => OK
Chars per sentence: 78.2941176471 110.228320801 71% => OK
Words per sentence: 16.1764705882 21.698381199 75% => OK
Discourse Markers: 8.82352941176 7.06452816374 125% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 2.0 4.19205298013 48% => OK
Sentences with positive sentiment : 6.0 4.33554083885 138% => OK
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: 0.0934132364229 0.272083759551 34% => The similarity between the topic and the content is low.
Sentence topic coherence: 0.0276870900369 0.0996497079465 28% => Sentence topic similarity is low.
Sentence topic coherence SD: 0.0391696195826 0.0662205650399 59% => OK
Paragraph topic coherence: 0.0560624162452 0.162205337803 35% => Maybe some paragraphs are off the topic.
Paragraph topic coherence SD: 0.0454665157691 0.0443174109184 103% => OK
Essay readability:
automated_readability_index: 9.5 13.3589403974 71% => Automated_readability_index is low.
flesch_reading_ease: 63.7 53.8541721854 118% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 8.4 11.0289183223 76% => OK
coleman_liau_index: 10.5 12.2367328918 86% => OK
dale_chall_readability_score: 8.33 8.42419426049 99% => OK
difficult_words: 68.0 63.6247240618 107% => OK
linsear_write_formula: 6.0 10.7273730684 56% => Linsear_write_formula is low.
gunning_fog: 8.4 10.498013245 80% => OK
text_standard: 9.0 11.2008830022 80% => OK
What are above readability scores?
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It is not exactly right on the topic in the view of e-grader. Maybe there is a wrong essay topic.
Rates: 3.33333333333 out of 100
Scores by essay e-grader: 1.0 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.