Summarize the points made in the lecture, being sure to explain how they respond to the specific points made in the reading passage.
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.
According to the reading, they author believe that sending people to an asteroid would have 3 benefits, however, the lecture cast a serious doubt on what was written in the reading.
Firstly the reading thinks that asteroids have less gravity because they are much smaller than planets. The aircraft's wouldn't be pulled as strong and it would be easier for them to take off and land. On the other hand, the lecture consists that people in low gravity environments would lose control of their muscles and lead to low bone density. Astronauts who are only in the outer space for several months suffer from all kinds of illnesses. You can't expect a normal person to do any better if they stay there for a long time.
Secondly, the article insists that some asteroids are rich in valuable elements and precious metals, so it would become a good source of these materials. however, the lecture believes there are 2 points wrong. First, the cost to support and transport those elements and metals would rise rapidly, in consider of the long distance. Second, you cannot guarantee that the price of these materials would remain the same all the time. The more amount you mine and collect, the lower the price will be. So it would not be such a good source for mining.
Finally, the reading material maintains that asteroids are often easier to reach than the moon or Mars. Many asteroids periodically come near earth’s orbit, so it would be efficient and affordable to get to and get back. However, the speaker of the lecture believes that it would indeed be easy to reach, but it would not necessarily be easy to return back to earth. The asteroids’ orbits would sometimes come near to the earth, but it would then quickly move away from earth. It would be easy for the spacecraft to get to the asteroid if you calculate the time correctly, but the asteroid doesn't just stay there close to the earth. So getting back from the asteroid would become a challenge.
| Post date | Users | Rates | Link to Content |
|---|---|---|---|
| 2022-08-26 | Liting Mai | 75 | view |
| 2022-01-19 | hellozxc | 71 | view |
| 2020-08-12 | YIngxin Zhang | 80 | view |
| 2020-03-13 | Harperchan1997 | 3 | view |
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Grammar and spelling errors:
Line 2, column 119, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: wouldn't
...uch smaller than planets. The aircrafts wouldnt be pulled as strong and it would be eas...
^^^^^^^
Line 2, column 357, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...and lead to low bone density. Astronauts who are only in the outer space for seve...
^^
Line 2, column 450, Rule ID: CANT[1]
Message: Did you mean 'can't' or 'cannot'?
Suggestion: can't; cannot
...suffer from all kinds of illnesses. You cant expect a normal person to do any better...
^^^^
Line 3, column 155, Rule ID: UPPERCASE_SENTENCE_START
Message: This sentence does not start with an uppercase letter
Suggestion: However
...ecome a good source of these materials. however, the lecture believes there are 2 point...
^^^^^^^
Line 4, column 346, Rule ID: RETURN_BACK[1]
Message: Use simply 'return'.
Suggestion: return
...but it would not necessarily be easy to return back to earth. The asteroids’ orbits would s...
^^^^^^^^^^^
Line 4, column 591, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: doesn't
...te the time correctly, but the asteroid doesnt just stay there close to the earth. So ...
^^^^^^
Transition Words or Phrases used:
but, finally, first, firstly, however, if, second, secondly, so, then, 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: 16.0 5.04856512141 317% => Less auxiliary verb wanted.
Conjunction : 13.0 7.30242825607 178% => OK
Relative clauses : 8.0 12.0772626932 66% => More relative clauses wanted.
Pronoun: 28.0 22.412803532 125% => Less pronouns wanted
Preposition: 34.0 30.3222958057 112% => 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: 1620.0 1373.03311258 118% => OK
No of words: 343.0 270.72406181 127% => OK
Chars per words: 4.72303206997 5.08290768461 93% => OK
Fourth root words length: 4.30351707066 4.04702891845 106% => OK
Word Length SD: 2.35734072815 2.5805825403 91% => OK
Unique words: 182.0 145.348785872 125% => OK
Unique words percentage: 0.530612244898 0.540411800872 98% => OK
syllable_count: 489.6 419.366225166 117% => OK
avg_syllables_per_word: 1.4 1.55342163355 90% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 4.0 3.25607064018 123% => OK
Article: 11.0 8.23620309051 134% => OK
Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted.
Conjunction: 3.0 1.51434878587 198% => OK
Preposition: 3.0 2.5761589404 116% => OK
Performance on sentences:
How many sentences: 18.0 13.0662251656 138% => OK
Sentence length: 19.0 21.2450331126 89% => OK
Sentence length SD: 36.5163585869 49.2860985944 74% => OK
Chars per sentence: 90.0 110.228320801 82% => OK
Words per sentence: 19.0555555556 21.698381199 88% => OK
Discourse Markers: 4.88888888889 7.06452816374 69% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 6.0 4.19205298013 143% => OK
Sentences with positive sentiment : 9.0 4.33554083885 208% => Less positive sentences wanted.
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: 0.133838665637 0.272083759551 49% => OK
Sentence topic coherence: 0.0504452117848 0.0996497079465 51% => OK
Sentence topic coherence SD: 0.0342755534591 0.0662205650399 52% => OK
Paragraph topic coherence: 0.08351131868 0.162205337803 51% => OK
Paragraph topic coherence SD: 0.0171245957447 0.0443174109184 39% => 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: 10.3 13.3589403974 77% => Automated_readability_index is low.
flesch_reading_ease: 69.11 53.8541721854 128% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 8.3 11.0289183223 75% => OK
coleman_liau_index: 10.1 12.2367328918 83% => OK
dale_chall_readability_score: 7.43 8.42419426049 88% => OK
difficult_words: 62.0 63.6247240618 97% => OK
linsear_write_formula: 9.0 10.7273730684 84% => OK
gunning_fog: 9.6 10.498013245 91% => OK
text_standard: 10.0 11.2008830022 89% => OK
What are above readability scores?
---------------------
Write the essay in 20 minutes.
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.