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 states that the project of sending humans to Mars would require solving an array of problems while the professor asserts that there are scientists have already come up with solutions to deal with those problems.
First, the author asserts that the trip to Mars and back is likely to take at least two years. However, the capacity of space vehicles is limited to bring the food, water and oxygen required a crew for a period of that long. Nevertheless, the professor argues that there is a solution called hydrophex, which is growing plants in space vehicles. It can not only make astronauts be able to calculate food but also release water that can turn to drinking water. Also, plants can also turn CO2 to fresh air.
Second, the author maintains that spending a long time in the zero-gravity environment has negative effects on the human body. However, the professor states that there are several technologies can solve those harm to the human body. For example, regular exercise can temper the decrease in muscle mass, and taking vitamins can slow down the lower of bone density.
Third, the author asserts that the astronauts would be exposed to the dangerous level of space radiation that much of which emitted by the Sun. Nevertheless, the professor states that the space radiation is not in danger levels all the time. She explains that the Sun only particular active in some time, and in those active time, astronauts can hide in the special instrument which is equipped on the space vehicle. Moreover, the special instrument would not add too much weight on the space vehicles.
| 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 |
- Burning coal in power plants produces a waste product called coal ash, a material that contains small amounts of potentially harmful chemicals. Environmentalists in the United States are concerned about the damage such harmful chemicals may be doing to th 80
- Glass is a favored building material for modern architecture, yet it is also very dangerous for wild birds. Because they often cannot distinguish between glass and open air, millions of birds are harmed every year when they try to fly through glass window 61
- Do you agree or disagree with the following statement?Workers are more satisfied when they have many different types of tasks to do during the workday than when they do similar tasks all day long.Use specific reasons and examples to support your answer. 60
- Do you agree or disagree with the following statement?Teachers were more appreciated and valued by society in the past than they are nowadays.Use specific reasons and examples to support your answer. 70
- Do you agree or disagree with the following statement?Workers are more satisfied when they have many different types of tasks to do during the workday than when they do similar tasks all day long.Use specific reasons and examples to support your answer. 60
Transition Words or Phrases used:
also, but, first, however, moreover, nevertheless, second, so, third, while, at least, for example
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 10.0 10.4613686534 96% => OK
Auxiliary verbs: 10.0 5.04856512141 198% => OK
Conjunction : 5.0 7.30242825607 68% => OK
Relative clauses : 15.0 12.0772626932 124% => OK
Pronoun: 17.0 22.412803532 76% => OK
Preposition: 33.0 30.3222958057 109% => OK
Nominalization: 6.0 5.01324503311 120% => OK
Performance on vocabulary words:
No of characters: 1342.0 1373.03311258 98% => OK
No of words: 272.0 270.72406181 100% => OK
Chars per words: 4.93382352941 5.08290768461 97% => OK
Fourth root words length: 4.06108636974 4.04702891845 100% => OK
Word Length SD: 2.45041660182 2.5805825403 95% => OK
Unique words: 148.0 145.348785872 102% => OK
Unique words percentage: 0.544117647059 0.540411800872 101% => OK
syllable_count: 414.9 419.366225166 99% => 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: 9.0 8.23620309051 109% => OK
Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted.
Conjunction: 2.0 1.51434878587 132% => OK
Preposition: 0.0 2.5761589404 0% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 13.0 13.0662251656 99% => OK
Sentence length: 20.0 21.2450331126 94% => OK
Sentence length SD: 41.7964920246 49.2860985944 85% => OK
Chars per sentence: 103.230769231 110.228320801 94% => OK
Words per sentence: 20.9230769231 21.698381199 96% => OK
Discourse Markers: 7.53846153846 7.06452816374 107% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 0.0 4.19205298013 0% => 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: 2.0 4.27373068433 47% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.0744515206089 0.272083759551 27% => The similarity between the topic and the content is low.
Sentence topic coherence: 0.0256482212593 0.0996497079465 26% => Sentence topic similarity is low.
Sentence topic coherence SD: 0.0368561293376 0.0662205650399 56% => OK
Paragraph topic coherence: 0.0547166283723 0.162205337803 34% => Maybe some paragraphs are off the topic.
Paragraph topic coherence SD: 0.045419765764 0.0443174109184 102% => OK
Essay readability:
automated_readability_index: 12.3 13.3589403974 92% => Automated_readability_index is low.
flesch_reading_ease: 59.64 53.8541721854 111% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 9.9 11.0289183223 90% => OK
coleman_liau_index: 11.31 12.2367328918 92% => OK
dale_chall_readability_score: 8.34 8.42419426049 99% => OK
difficult_words: 64.0 63.6247240618 101% => OK
linsear_write_formula: 13.0 10.7273730684 121% => OK
gunning_fog: 10.0 10.498013245 95% => OK
text_standard: 10.0 11.2008830022 89% => 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
---------------------
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.