Scientists are considering the possibility of sending humans to Mars in the coming decades. Although there have been successful manned missions to the Moon in the 1960s and 1970s, Mars is 150 times further away from Earth than the Moon is. Thus the project of sending humans to Mars would require solving an array of problems the Moon missions did not have to face. One problem is that a round-trip to Mars and back is likely to take at least two years. The trip to the Moon lasted only a few days, and it was easy to bring enough supplies of food, water, and oxygen; but the cargo capacity of space vehicles is too limited to put on board the food, water, and oxygen required by a crew for a period of two years. Without those essentials, though, a Mars mission is impossible. A second problem is that astronauts on the Mars mission would be in the zero-gravity environment of space for many months at a time. Spending a long time in the zero-gravity environment has negative effects on the human body, such as decreased muscle mass and lower bone density. Over the course of a two-year mission, the effects would be so severe, they would make it impossible for humans to make the trip without experiencing grave medical problems. Finally, astronauts on a mission to Mars would be exposed to dangerous levels of space radiation, much of which comes in the form of charged particles emitted by the Sun. Earth’s magnetic field, which normally protects us from dangerous solar radiation, would not be able to protect a spaceship traveling in interplanetary space. Constructing a shield that would protect the whole spaceship from space radiation is at present impossible because it would add too much weight to the ship.
Recently, there are heated debates over whether sending human to Mars is possible. While in the reading, the author proposes three difficulties that makes the hope seem dimmed, the lecturer, on the other hand, believes that the challenges could be solved.
Firstly, since the trip to and forth Mars will take two years, it is especially difficult to take in all the supplies needed for trip. Thus, the author considers it impractical to send human to Mars without those essentials. However, the lecturer points out that there is now a technology called hydro-pond, which can cultivate food and even recycle the water used. Also, the oxygen will be released due to the plants. As a result, the lecturer believes the problem can be solved.
Next, the author suggests that from the study of astronauts taking their mission to orbit the earth, it is indicated that they have serious health problems. Yet, according to the lecturer, some techniques have been proposed to cure this problem. For example, regular exercises are implemented and vitamin, such as calcium, are taken to build up the bone density. Thus, the health problem should be out of concern.
Finally, the radiation in the space may hurt the astronauts, so the author casts doubts on the possibility of protecting them during the trip. On the other hand, the lecturer indicates that the dangerous radiation only occurs sometimes. Thus, the protected shield doesn't need to cover the whole spaceship. Consequently, with the instrument to detect the radiation level, the astronauts can hide in the shielded area that can protect themselves.
Grammar and spelling errors:
Line 7, column 265, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: doesn't
...s sometimes. Thus, the protected shield doesnt need to cover the whole spaceship. Cons...
^^^^^^
Transition Words or Phrases used:
also, consequently, finally, first, firstly, however, if, may, so, thus, while, for example, such as, as a result, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 12.0 10.4613686534 115% => OK
Auxiliary verbs: 10.0 5.04856512141 198% => OK
Conjunction : 3.0 7.30242825607 41% => More conjunction wanted.
Relative clauses : 8.0 12.0772626932 66% => More relative clauses wanted.
Pronoun: 16.0 22.412803532 71% => OK
Preposition: 30.0 30.3222958057 99% => OK
Nominalization: 4.0 5.01324503311 80% => OK
Performance on vocabulary words:
No of characters: 1346.0 1373.03311258 98% => OK
No of words: 262.0 270.72406181 97% => OK
Chars per words: 5.13740458015 5.08290768461 101% => OK
Fourth root words length: 4.02323427807 4.04702891845 99% => OK
Word Length SD: 2.60929162298 2.5805825403 101% => OK
Unique words: 159.0 145.348785872 109% => OK
Unique words percentage: 0.606870229008 0.540411800872 112% => OK
syllable_count: 402.3 419.366225166 96% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 2.0 3.25607064018 61% => OK
Article: 12.0 8.23620309051 146% => OK
Subordination: 3.0 1.25165562914 240% => Less adverbial clause wanted.
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 5.0 2.5761589404 194% => OK
Performance on sentences:
How many sentences: 15.0 13.0662251656 115% => OK
Sentence length: 17.0 21.2450331126 80% => The Avg. Sentence Length is relatively short.
Sentence length SD: 38.3749918567 49.2860985944 78% => OK
Chars per sentence: 89.7333333333 110.228320801 81% => OK
Words per sentence: 17.4666666667 21.698381199 80% => OK
Discourse Markers: 8.8 7.06452816374 125% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 1.0 4.19205298013 24% => OK
Sentences with positive sentiment : 5.0 4.33554083885 115% => OK
Sentences with negative sentiment : 6.0 4.45695364238 135% => OK
Sentences with neutral sentiment: 4.0 4.27373068433 94% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.127020616132 0.272083759551 47% => OK
Sentence topic coherence: 0.0421059913098 0.0996497079465 42% => OK
Sentence topic coherence SD: 0.05933682054 0.0662205650399 90% => OK
Paragraph topic coherence: 0.0709453190591 0.162205337803 44% => OK
Paragraph topic coherence SD: 0.0285586785365 0.0443174109184 64% => OK
Essay readability:
automated_readability_index: 11.5 13.3589403974 86% => Automated_readability_index is low.
flesch_reading_ease: 62.68 53.8541721854 116% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 8.7 11.0289183223 79% => OK
coleman_liau_index: 12.24 12.2367328918 100% => OK
dale_chall_readability_score: 8.94 8.42419426049 106% => OK
difficult_words: 74.0 63.6247240618 116% => OK
linsear_write_formula: 11.0 10.7273730684 103% => 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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Rates: 81.6666666667 out of 100
Scores by essay e-grader: 24.5 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.