GK
SOLAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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There are no living organisms in Martian soil.
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Mars is slightly oval in shape.
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Mars is about one-fourth the size of Earth.
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The gravity on Mars is much less than on Earth.
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Detailed explanation-1: -According to scientists, Mars is self-sterilizing. They believe the combination of solar ultraviolet radiation that saturates the surface, the extreme dryness of the soil and the oxidizing nature of the soil chemistry prevent the formation of living organisms in the Martian soil.
Detailed explanation-2: -While no evidence of life has been found on the red planet, researchers simulated conditions on Mars in a lab to see how bacteria and fungi could survive.
Detailed explanation-3: -When Viking 1 and 2 touched down on Mars in 1976, each carried several instruments to study the planet and look for signs of life. The Labeled Release experiment mixed small samples of Martian soil with drops of water containing a nutrient solution and some radioactive carbon.
Detailed explanation-4: -Mars 3 arrived at Mars on December 2, 1971. The lander was released and became the first successful landing on Mars. It failed after relaying 20 seconds of video data to the orbiter.