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.
Word Count: 226
The reading passage and the lecture are both about colonization of asteroids. The author in the article argues that establishing a colony would be much easier on an asteroid than on the moon or Mars. However, the lecturer casts doubt on the ideas mentioned in the article.
To begin with, the author believes that landing on asteroids would be safer as they are known to have less gravity pull due to their smaller size. In addition, according to the reading, the spaceships would be able to carry more equipment and less fuel since taking off would also be relatively easy due to lower gravity. The lecturer, on the other hand, points out downsides in this argument. He states that microgravity affects muscle mass and bone density. The speaker further elaborates that astronauts who spent few months on spacecrafts suffered from loss of muscle mass and decreased bone density. Therefore, any colonists who would stay for long time on an asteroid would suffer major health problems.
Secondly, the writer assumes that mining rare earth metals, such as gold and platinum, which are abundant on the asteroids could be profitable and cover any expenses spent to set up the colony. Nevertheless, the lecturer challenges this claim. He holds that the cost of supporting the colony and transporting the metals to earth would lower any profits. Moreover, if the minerals were mined in large quantities, the supply would increase, which would drive the market price down.
Lastly, the excerpt asserts that getting to the asteroid would be easy and affordable as they approach earth's orbit while a planet like Mars, on the contrary, is a two-year trip away. Conversely, the lecturer indicates that asteroids take unusual orbits and Although it would be easy to get to the asteroid when it comes close to earth, it would not be easy to return as those asteroids sometimes go even further than Mars in their orbit. Accordingly, a journey back to earth would be tougher and more costly.
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| 2020-01-16 | Kalima | 81 | view |
| 2019-12-29 | Bonjourkmm | 83 | view |
| 2019-12-27 | Amirreza97 | 3 | view |
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Grammar and spelling errors:
Line 13, column 511, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...earth would be tougher and more costly.
^^^^^^^
Transition Words or Phrases used:
accordingly, also, conversely, however, if, lastly, moreover, nevertheless, second, secondly, so, therefore, while, in addition, such as, on the contrary, to begin with, 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: 14.0 5.04856512141 277% => Less auxiliary verb wanted.
Conjunction : 11.0 7.30242825607 151% => OK
Relative clauses : 13.0 12.0772626932 108% => OK
Pronoun: 20.0 22.412803532 89% => OK
Preposition: 41.0 30.3222958057 135% => OK
Nominalization: 4.0 5.01324503311 80% => OK
Performance on vocabulary words:
No of characters: 1659.0 1373.03311258 121% => OK
No of words: 332.0 270.72406181 123% => OK
Chars per words: 4.99698795181 5.08290768461 98% => OK
Fourth root words length: 4.2685907696 4.04702891845 105% => OK
Word Length SD: 2.55417957179 2.5805825403 99% => OK
Unique words: 195.0 145.348785872 134% => OK
Unique words percentage: 0.58734939759 0.540411800872 109% => OK
syllable_count: 505.8 419.366225166 121% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 3.0 3.25607064018 92% => OK
Article: 13.0 8.23620309051 158% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 5.0 2.5761589404 194% => OK
Performance on sentences:
How many sentences: 16.0 13.0662251656 122% => OK
Sentence length: 20.0 21.2450331126 94% => OK
Sentence length SD: 55.2604274662 49.2860985944 112% => OK
Chars per sentence: 103.6875 110.228320801 94% => OK
Words per sentence: 20.75 21.698381199 96% => OK
Discourse Markers: 11.6875 7.06452816374 165% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 1.0 4.19205298013 24% => OK
Sentences with positive sentiment : 11.0 4.33554083885 254% => Less positive sentences wanted.
Sentences with negative sentiment : 3.0 4.45695364238 67% => 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: 0.0944244836249 0.272083759551 35% => The similarity between the topic and the content is low.
Sentence topic coherence: 0.0328476678163 0.0996497079465 33% => Sentence topic similarity is low.
Sentence topic coherence SD: 0.0392023943325 0.0662205650399 59% => OK
Paragraph topic coherence: 0.0713315863563 0.162205337803 44% => OK
Paragraph topic coherence SD: 0.0413028851149 0.0443174109184 93% => OK
Essay readability:
automated_readability_index: 12.5 13.3589403974 94% => Automated_readability_index is low.
flesch_reading_ease: 59.64 53.8541721854 111% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 9.9 11.0289183223 90% => OK
coleman_liau_index: 11.72 12.2367328918 96% => OK
dale_chall_readability_score: 8.72 8.42419426049 104% => OK
difficult_words: 86.0 63.6247240618 135% => OK
linsear_write_formula: 10.5 10.7273730684 98% => OK
gunning_fog: 10.0 10.498013245 95% => OK
text_standard: 10.0 11.2008830022 89% => 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
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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.