66. When the earth is at its maximum distance from the sun it is said to be in

1. 1. aphelion

   
   
   

   2. perihelion

   
   
   

   3. apogee

   
   
   

   4. perigee

   
   
   

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   aphelion

   Correct Option: A

   aphelion

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67. What is the primary cause of the day and night ?

1. 1. Earth's annual motion

   
   
   

   2. Earth's daily motion

   
   
   

   3. Inclination of the earth's axis and its rotation

   
   
   

   4. Inclination of the earth's axis and its revolution

   
   
   

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   Earth's daily motion

   Correct Option: B

   Earth's daily motion

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