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.
The article and the lecture are both about the challenges that humans will face in the journey to Mars. The author states that there are some problems that make it impossible to travel to Mars according to the technology we have. In contrast, the lecturer is of the opinion that the claims made by author are not reasonable. He mentions that there are methods and techniques which can help us to travel there.
To begin with, the author writes that tripping to Mars will take 2 years. This long period of time demands lots of food and oxygen for the journey. It is stated in the article that this amount of source cannot be carried by the spaceships with the current technology. The lecturer rebuts this by mentioning that they can use some creative methods to produce food and oxygen during the trip. They can place the roots of the plants in the water in order to utilize the maximum space of the spaceship, Additionally, these plants will produce oxygen and absorb CO2 in the spaceship air.
Secondly, the lecturer mentions that astronauts will experience zero-gravity situation in this journey. As a result, they may expose to some dangerous issues like loosing muscle weight and bone density. It is written in the reading that recently mission of astrounats to the space proved that asronaurs faced that problems. However, the lecturer opposes this claim. She mentions that there are methods which can be used to prevent these effects. For example, they can exercise regularly, additionally they should use some mineral materials like Calcium to save their bone density.
Finally, the author mentions that the spaceships in this mission will be exposed to the sun raditions. The reading states that the magnetic field of the earth, which, helps to prevent these radiations to receive the earth's surface doesn't exist there. But, the lecturer is on the opinion that this phenomenon occurs occasinally. He says that spaceships can be equipped to resist against this radiation after they detect that they are occuring.
| 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 |
- 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 t 3
- 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 projec 3
- Because of climate change, more and more land that was once used to grow crops or provide food for animals is turning to dry, unusable desert land. There are many proposals about how to stop this process, known as desertification. A number of proposals in 73
- Do you agree or disagree with the following statement? The rules that societies today expect young people to follow and obey are too strict. Use specific reasons and examples to support your answer. 73
- 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 t 3
Grammar and spelling errors:
Line 5, column 85, Rule ID: PERIOD_OF_TIME[1]
Message: Use simply 'period'.
Suggestion: period
...ng to Mars will take 2 years. This long period of time demands lots of food and oxygen for the...
^^^^^^^^^^^^^^
Line 17, column 9, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...ve their bone density. Finally, the author mentions that the spaceships ...
^^
Line 17, column 233, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: doesn't
...adiations to receive the earths surface doesnt exist there. But, the lecturer is on th...
^^^^^^
Transition Words or Phrases used:
but, finally, however, may, second, secondly, so, for example, in contrast, as a result, to begin with
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 : 6.0 7.30242825607 82% => OK
Relative clauses : 20.0 12.0772626932 166% => OK
Pronoun: 45.0 22.412803532 201% => Less pronouns wanted
Preposition: 46.0 30.3222958057 152% => OK
Nominalization: 3.0 5.01324503311 60% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1702.0 1373.03311258 124% => OK
No of words: 339.0 270.72406181 125% => OK
Chars per words: 5.02064896755 5.08290768461 99% => OK
Fourth root words length: 4.29091512845 4.04702891845 106% => OK
Word Length SD: 2.47354587218 2.5805825403 96% => OK
Unique words: 171.0 145.348785872 118% => OK
Unique words percentage: 0.504424778761 0.540411800872 93% => More unique words wanted or less content wanted.
syllable_count: 520.2 419.366225166 124% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 10.0 3.25607064018 307% => Less pronouns wanted as sentence beginning.
Article: 10.0 8.23620309051 121% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 2.0 2.5761589404 78% => OK
Performance on sentences:
How many sentences: 19.0 13.0662251656 145% => OK
Sentence length: 17.0 21.2450331126 80% => The Avg. Sentence Length is relatively short.
Sentence length SD: 32.0157509712 49.2860985944 65% => OK
Chars per sentence: 89.5789473684 110.228320801 81% => OK
Words per sentence: 17.8421052632 21.698381199 82% => OK
Discourse Markers: 5.36842105263 7.06452816374 76% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 3.0 4.19205298013 72% => OK
Sentences with positive sentiment : 6.0 4.33554083885 138% => OK
Sentences with negative sentiment : 4.0 4.45695364238 90% => OK
Sentences with neutral sentiment: 9.0 4.27373068433 211% => Less facts, knowledge or examples wanted.
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.0536298144366 0.272083759551 20% => The similarity between the topic and the content is low.
Sentence topic coherence: 0.0187458313095 0.0996497079465 19% => Sentence topic similarity is low.
Sentence topic coherence SD: 0.0461723921474 0.0662205650399 70% => OK
Paragraph topic coherence: 0.0430072634628 0.162205337803 27% => Maybe some paragraphs are off the topic.
Paragraph topic coherence SD: 0.0599407589279 0.0443174109184 135% => OK
Essay readability:
automated_readability_index: 11.1 13.3589403974 83% => 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: 11.54 12.2367328918 94% => OK
dale_chall_readability_score: 8.21 8.42419426049 97% => OK
difficult_words: 80.0 63.6247240618 126% => OK
linsear_write_formula: 8.0 10.7273730684 75% => 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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Write the essay in 20 minutes.
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.