Rajasthan Board Class 10 Science Chapter 17 Solution Search of Life Outside the Earth RBSE Class 10 Science Solution for Chapter 17
Objective type questions.
1.) The word Alien means-
a) Jadu
b) Organism outside the earth
c) Complex organism
d) Organism similar to cow
Ans-b) organism outside the earth
2.) Life is possible outside the earth-
a) On any star
b) Anywhere
c) On planet similar to earth
d) On any planet
Ans- c) on planet similar to earth
3.) First space craft to move outside the solar system was-
a) Chandryaan 2
b) Mangalyaan
c) Pioneer 1
d) Pioneer 10
Ans-d) pioneer -1
4.) Instrumental used for listening to the murmuring in the universe-
a) Radio telescope
b) Telescopes
c) Microscope
d) None of these
Ans-a) radio telescope
5.) From which place can you see the sunrise 15 times a day?
a) At pole
b) At international space station
c) At mars
d) At moon
Ans-b) at international space station.
Very short type questions.
6.) Which place is the living place for human outside the earth?
Ans-mars
8.) The physical environment of the earth and the organisms living on earth together form a system . what is this phenomenon called?
Ans-ecosystem
9.) During the origin of the earth the environmental was very hot and explosive how much time did it take to cool down?
Ans- 50 million or one billion years to cool down.
Short type questions.
10.) How many planets similar to the earth can exist in our galaxy the milky way?
Ans – there are about many planets but one of these galaxies in named milky way of which our sun and we live on of its planets the earth.
11.) What is the meaning of the word Alien?
Ans- the organism out side the earth is called the Alien. We are familiar the movei ‘koi mil gaya’ it was imagined that a child was left on the earth who came from the family UFO this type of organism is called Alien.
12.) What were the scientist scared of during the launching of the pioneer -10?
Ans-scientist was scared due to any wrong notion the life outside earth would attack people on the earth. The pioneer 10 spacecraft was pass to by Jupiter and then go out of our solar system. The fear was that during its infinite journey, pioneer 10 would come in contact with some developed civilizations. The developed civilizations considered the pioneer 10 as an attack them from the people of the earth and would retalita us.
13.) According to Darwin how did the first organism originate on earth?
Ans- Darwins said all the living organism come which are ever lived on this earth may be descended from some primordial form. He said the variations of species occurs reandomly and that the survival or extinction of each organism is determined by that organism’s ability to adapt to ist environmental. And he was wrote the book name The origin of Species.
14.) What do you by creative and destructive forces?
Ans- creative destructive refers to the incessant product and process innovation mechanism which new production units.
The destructive forces are the process of breaking down of rocks and land due to forces such as gravity, wind ,water and ice.
Essay type questions.
15.) What was the man’s imagination about the organisms outside the earth during the launch of pioneer -10. What steps were taken to be safe from the assumed danger?
Ans-the man’s think that the organism are outside the earth are like UFO or Alien. In the year 1972 when pioneer 10 was launched scientist scared that due to any wrong notion, the life outside earth would attack people on the earth. Ppioneer 10 spaecraft was pass by jupitor and then to go out our solar system. The fear was that during its infinite journay pioneer 10 would come in contact with other civilization could considered pioneer 10 as an attck over them from the people of the earth and would retail us. To remove this misconceptions a plate was placed on pioneer 10 depicting male and female in a friendly posture and in sign laungue, a message was written about pioneer10 sent from the earth. This planned completed mission successfully.
16.) Explain the importance of satellites in details?
Ans-satellites are the main interest of man’s in the space. Artificial satellites provide information about the earth surface and about the atmosphere of the earth these information can not be obtained on the surface of the earth. Today the communication system of the world is based on the artificial satellite system. Military proposed of of satellites are increased therefore many proposed satellites are very important.
17.) Explain the importance of India in the world of space campaign?
Ans-space research in India started in 1948 as a physical research laboratory in Ahemdabad. In 1962 the Indian Government formed the Indian spece research committee under the leadership of Dr. ikram Sarabhai. In 1969this committee was replaced by Indian Space and Research Organization(ISRO). ISRO has stared developing space technology. Tndia launched its first rocket Rohini-75 in 1969 which was only 75m in diameter. India made an arrangement with Russia and in 1975 with help of Russian rocket its first spacecraft Aryabhhat into space. After successful flight and placing in earth’s orbit India book 11th passion in the field os space research after America. After India sent two more satellites in Bhaskar series with help of Russia. India has been successful enhancing its rockets capacities. Then after acquiring the ability to send the spacecraft by its own rocket, India took the 6ht place in the world. In 2008 chandrayan -1 in the moon’s orbit and it’s successful achievements is finding water on the moon . India sent Mangalayan in the orbit of mars and made the first place in the world and mangalyan was declared the best invention of 2014.
This are the achievements of the India at space campaign.