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 Marsand 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 problemsFinally, 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 if would add too much weight to the ship..
The reading passage states that the plan of sending human to mars has some problems that the technology to solve them is not in hand yet. However, the professor in the lecture casts doubt on the problems presented by the reading passage and explains that some solutions have been found.
First, considering the reading passage, Travelling to mars will long at least 2 month and space vehicles do not have enough space to contain suffiecient supply of food, water and oxygen for this long period. In contrast, the professor in the lecture contradicts the idea made by reading passage and further explains that there is no need to bring that much supply from earth. they can cultivate plants with the help of recently found techniques in which their roots are in water instead of soil. The food will be provided by cultivation, water can be recycled and used again and also plant will use carbon dioxide to produce oxygen for breathing.
Second, reading claims that astronuts facing zero-gravity for a long period, will have health problems such as reduce in their mucles' mass. On the contrary, the professor in the lecture refutes the information presented in the reading passage and make the point that these help problems can be solved with some techniques such as using sufficient amount of vitamins.
Third, the author in the reading puts froward the idea that astronuts can not safe from space radiations which are quite dangerous for human body and also a shield for spaceship can not be built since it will bring too much weight. On the other hand, the speaker contradicts the idea and adds that space radiations are not always dangerous and harmful radiations happen occasionally. So they should locate equipments to monitor radiations in spaceship and design a small space to protect astronuts from radiations in times it is needed which will not be such heavy.
| Post date | Users | Rates | Link to Content |
|---|---|---|---|
| 2020-01-20 | f.jafary66@gmail.com | 80 | view |
| 2020-01-18 | naziii | 3 | view |
| 2020-01-07 | 3dra | 3 | view |
| 2019-12-27 | Amirreza97 | 3 | view |
| 2019-12-16 | jeffhjz | 3 | view |
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Grammar and spelling errors:
Line 7, column 55, Rule ID: TO_NON_BASE[1]
Message: The verb after "to" should be in the base form: 'mar'.
Suggestion: mar
...ring the reading passage, Travelling to mars will long at least 2 month and space ve...
^^^^
Line 7, column 377, Rule ID: UPPERCASE_SENTENCE_START
Message: This sentence does not start with an uppercase letter
Suggestion: They
...d to bring that much supply from earth. they can cultivate plants with the help of r...
^^^^
Line 19, column 477, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...ns in spaceship and design a small space to protect astronuts from radiations in ...
^^
Transition Words or Phrases used:
also, first, however, second, so, third, at least, in contrast, such as, on the contrary, 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: 13.0 5.04856512141 257% => Less auxiliary verb wanted.
Conjunction : 12.0 7.30242825607 164% => OK
Relative clauses : 12.0 12.0772626932 99% => OK
Pronoun: 18.0 22.412803532 80% => OK
Preposition: 39.0 30.3222958057 129% => OK
Nominalization: 2.0 5.01324503311 40% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1584.0 1373.03311258 115% => OK
No of words: 316.0 270.72406181 117% => OK
Chars per words: 5.01265822785 5.08290768461 99% => OK
Fourth root words length: 4.21620550194 4.04702891845 104% => OK
Word Length SD: 2.4817935835 2.5805825403 96% => OK
Unique words: 159.0 145.348785872 109% => OK
Unique words percentage: 0.503164556962 0.540411800872 93% => More unique words wanted or less content wanted.
syllable_count: 464.4 419.366225166 111% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 1.0 3.25607064018 31% => OK
Article: 7.0 8.23620309051 85% => OK
Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted.
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 4.0 2.5761589404 155% => OK
Performance on sentences:
How many sentences: 11.0 13.0662251656 84% => 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: 28.0 21.2450331126 132% => The Avg. Sentence Length is relatively long.
Sentence length SD: 36.0045910755 49.2860985944 73% => OK
Chars per sentence: 144.0 110.228320801 131% => OK
Words per sentence: 28.7272727273 21.698381199 132% => OK
Discourse Markers: 9.72727272727 7.06452816374 138% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 3.0 4.19205298013 72% => OK
Sentences with positive sentiment : 4.0 4.33554083885 92% => OK
Sentences with negative sentiment : 5.0 4.45695364238 112% => 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: 0.0775671880148 0.272083759551 29% => The similarity between the topic and the content is low.
Sentence topic coherence: 0.034321225098 0.0996497079465 34% => Sentence topic similarity is low.
Sentence topic coherence SD: 0.0334826704794 0.0662205650399 51% => OK
Paragraph topic coherence: 0.0514922510812 0.162205337803 32% => Maybe some paragraphs are off the topic.
Paragraph topic coherence SD: 0.0312125640404 0.0443174109184 70% => OK
Essay readability:
automated_readability_index: 16.5 13.3589403974 124% => OK
flesch_reading_ease: 51.52 53.8541721854 96% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 13.0 11.0289183223 118% => OK
coleman_liau_index: 12.37 12.2367328918 101% => OK
dale_chall_readability_score: 7.92 8.42419426049 94% => OK
difficult_words: 58.0 63.6247240618 91% => OK
linsear_write_formula: 13.0 10.7273730684 121% => OK
gunning_fog: 13.2 10.498013245 126% => OK
text_standard: 13.0 11.2008830022 116% => OK
What are above readability scores?
---------------------
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.