31. The inexhaustible sources of energy of the stars is due to

1. 1. Conversion of Hydrogen to Helium

   
   
   

   2. Conversion of Helium to Hydrogen

   
   
   

   3. Decay of radioactive elements

   
   
   

   4. Excess of oxygen that helps buning and release of energy

   
   
   

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   NA

   Correct Option: A

   NA

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32. Which of the following statements can be taken as evidence to show that the Earth is spherical ?

1. 1. The rotation of the earth from west to east.

   
   
   

   2. Some parts of the earth have day when other parts have night

   
   
   

   3. The earth horizon is seen to be curved when seer from an aeroplane.

   
   
   

   4. The earth's revolution around the sun

   
   
   

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   NA

   Correct Option: B

   NA

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33. Meteorites are the heavenly bodies

1. 1. Between the Mars and the Jupiter

   
   
   

   2. Between the Saturn and the Neptune

   
   
   

   3. Between the Mars and the Venus

   
   
   

   4. That burn brightly on entering the Earth atmosphere

   
   
   

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   NA

   Correct Option: D

   NA

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34. Springs tides occur when

1. 1. The moon is nearest to the earth

   
   
   

   2. The moon is farthest from the earth

   
   
   

   3. The moon, the sun and the earth are right angles with the earth are in the same line

   
   
   

   4. The moon, the sun and the earth are in the same line

   
   
   

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   NA

   Correct Option: D

   NA

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35. The term 'syzygy' is reffered to when the

1. 1. Earth is at perihelion and moon at perigee

   
   
   

   2. Earth is at apehelion and moon at apogee

   
   
   

   3. Moon and Sun are at right angles with reference to tthe earth

   
   
   

   4. Moon, Sun and Earth lie along a straight line

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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