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.
The reading passage explores the issue of advantages of sending people to asteroids for living. The professor's lecture deals with the same issue. However, he thinks the three advantages in reading have lots of downsides. And in the lecture, he uses three specific points to support his idea.
To begin with, even though the reading suggests that asteroids have lower gravity because they are often much smaller than planets, and this make them easy to land and take off again, the professor argues in the lecture that the low gravity environment can lead some health problem for people, like lower the bone density and muscle mass.
Moreover, contrary to the statement in the reading that there are precious metals in some asteroids which can be profitable for mining and sending them back to Earth, the professor contends that the cost could be too expensive for transportation. Furthermore, its price may not maintain the same because the price would reduce when the quantity of these rare metals increases.
Finally, the author of the reading asserts that some of asteroids are easy to reach because some of them periodically come within or near Earth's orbit whereas the professor claims that while they could be so near Earth, they also could be so far away from Earth's orbit, even near Mar's orbit. Their unusual orbits make landing on them a great challenge.
In conclusion, the professor clearly identifies all the weakness in the reading passage and convincingly shows the central argument of the reading is incorrect.
Grammar and spelling errors:
Line 7, column 49, Rule ID: MOST_SOME_OF_NNS[1]
Message: After 'some of', you should use 'the' ('some of the asteroids') or simply say ''some asteroids''.
Suggestion: some of the asteroids; some asteroids
... the author of the reading asserts that some of asteroids are easy to reach because some of them ...
^^^^^^^^^^^^^^^^^
Transition Words or Phrases used:
also, finally, furthermore, however, if, may, moreover, so, whereas, while, in conclusion, to begin with
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 8.0 10.4613686534 76% => OK
Auxiliary verbs: 7.0 5.04856512141 139% => OK
Conjunction : 7.0 7.30242825607 96% => OK
Relative clauses : 8.0 12.0772626932 66% => More relative clauses wanted.
Pronoun: 20.0 22.412803532 89% => OK
Preposition: 32.0 30.3222958057 106% => OK
Nominalization: 4.0 5.01324503311 80% => OK
Performance on vocabulary words:
No of characters: 1285.0 1373.03311258 94% => OK
No of words: 253.0 270.72406181 93% => More content wanted.
Chars per words: 5.0790513834 5.08290768461 100% => OK
Fourth root words length: 3.98822939669 4.04702891845 99% => OK
Word Length SD: 2.47671907711 2.5805825403 96% => OK
Unique words: 146.0 145.348785872 100% => OK
Unique words percentage: 0.577075098814 0.540411800872 107% => OK
syllable_count: 387.9 419.366225166 92% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 5.0 3.25607064018 154% => OK
Article: 6.0 8.23620309051 73% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 2.0 1.51434878587 132% => OK
Preposition: 3.0 2.5761589404 116% => OK
Performance on sentences:
How many sentences: 10.0 13.0662251656 77% => Need more sentences. Double check the format of sentences, make sure there is a space between two sentences, or have enough periods. And also check the lengths of sentences, maybe they are too long.
Sentence length: 25.0 21.2450331126 118% => OK
Sentence length SD: 99.2318497258 49.2860985944 201% => The lengths of sentences changed so frequently.
Chars per sentence: 128.5 110.228320801 117% => OK
Words per sentence: 25.3 21.698381199 117% => OK
Discourse Markers: 10.4 7.06452816374 147% => OK
Paragraphs: 5.0 4.09492273731 122% => OK
Language errors: 1.0 4.19205298013 24% => OK
Sentences with positive sentiment : 6.0 4.33554083885 138% => OK
Sentences with negative sentiment : 1.0 4.45695364238 22% => More negative sentences wanted.
Sentences with neutral sentiment: 3.0 4.27373068433 70% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.0662605169847 0.272083759551 24% => The similarity between the topic and the content is low.
Sentence topic coherence: 0.0231464170117 0.0996497079465 23% => Sentence topic similarity is low.
Sentence topic coherence SD: 0.0245863450563 0.0662205650399 37% => Sentences are similar to each other.
Paragraph topic coherence: 0.0348458088569 0.162205337803 21% => Maybe some paragraphs are off the topic.
Paragraph topic coherence SD: 0.0200371010739 0.0443174109184 45% => Paragraphs are similar to each other. Some content may get duplicated or it is not exactly right on the topic.
Essay readability:
automated_readability_index: 15.1 13.3589403974 113% => OK
flesch_reading_ease: 54.56 53.8541721854 101% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 11.9 11.0289183223 108% => OK
coleman_liau_index: 12.48 12.2367328918 102% => OK
dale_chall_readability_score: 8.75 8.42419426049 104% => OK
difficult_words: 62.0 63.6247240618 97% => OK
linsear_write_formula: 10.5 10.7273730684 98% => OK
gunning_fog: 12.0 10.498013245 114% => OK
text_standard: 12.0 11.2008830022 107% => 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.