Read the passage given below carefully and answer the questions that follow:
1. For the last many decades, people have been mystified about the presence of aliens. Efforts have been
made to solve this puzzle because this will get us a step closer to discovering if Earth is the only planet to
support life. If is difficult to know if extraterrestrials exist, unless they get in touch with us or we find some
evidence of their existence. Scientists do not rule out the possibility of life in the form of bacteria or other
microorganisms, rather than intelligent human beings. But the search continues.
2. NASA captured images of Mars and they revealed that the Red Planet is somewhat like Earth—it is likely
to have had water at some point in its ancient history. Some stargazers claim to have seen aliens there.
However, scientists do not support these claims. It is believed that Mars was frozen once upon a time-a few
billion years ago. The surface of the planet melted, and this resulted in the creation of deep valleys and
canyons on its surface.
3. Scientists believe that there could be bacteria on Mars that bear resemblance to the simple microbes that
exist in the ice-bound lakes of Antarctica. Scientists believe like Earth, Mars too was struck by huge
asteroids, sending fragments of both these planets into space. Scientists think that the discovery of life on
Mars could help us understand how life first began on Earth.
4. Alfred McEwen, professor of Planetary Geology at the University of Arizona, said: the search for ancient
life on Mars may really be the search for the origin of life on Earth’. The samples collected by NASA’s
Mars Rovers have detected complex organic compounds on Mars. Professor McEwen feels life probably
still survives there in pockets below the surface where it would be warmer and that the microbes were
sheltered from cosmic radiation. This raises an interesting question-Did life originate on Earth and get
transported to Mars or was it the other way round?
Answer the following questions very briefly:
1. Why has there been a mystery surrounding aliens?
2. Why have scientists been trying to solve the mystery?
3. Why is it difficult for scientists to know the truth?
4. What kind of life do scientists expect on other planets?
5. Why is the possibility of life on Mars not ruled out?
6. What are the indications of water on Mars?
7. What is the similarity that the scientists see between Earth and Mars?
8. How will finding life on Mars help us?
Answers
1. Why has there been a mystery surrounding aliens?
answers: there is a mystery surrounding aliens as human being have no evidence about such a existence of aliens and it will be an mystery until we find such a evidence proving about alien existence
2-Why have scientists been trying to solve the mystery?
answers: scientists been trying to solve mystery because this will get us a step closer to discovering if Earth is the only planet to support life and even could help us understand how life first began on Earth
3- Why is it difficult for scientists to know the truth?
answer- it is difficult to truth on aliens existence because of no evidence
4-What kind of life do scientists expect on other planets?
answer-Scientists believe that there could be bacteria on Mars that bear resemblance to the simple microbes that exist in the ice-bound lakes of Antarctica.
5-Why is the possibility of life on Mars not ruled out?
answers- because of ice
6-What are the indications of water on Mars?
indication of water on mars can be believed because of ice which is melted due to heat and evaporated in its atmosphere or surroundings or even deep underground
What is the similarity that the scientists see between Earth and Mars?
These two planets in our solar system have a few geological similarities such as Mars is one-half the diameter of the Earth and the amount of dry land surface present on both the planets is the same
How will finding life on Mars help us?
answers-Rocks on Mars Can Tell Us About the Planet's History and Its Potential for Harboring Life. Of fundamental importance are the age and composition of different types of rocks on the Martian surface. Geologists use the age of rocks to determine the sequence of events in a planet's history
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