TEST PAPER 3 - UNIT 3 - 25 MARKS

There are 14 questions in all and time limit is 45 minutes.

SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 4]

1. What is used generally as a connecting material in solar panels ?
   
   
   
   1. Silicon
   2. Silver
   3. Selenium
   4. Germanium
      
   
   
2. ______ invented artificial radioactivity.
   
   
   
   1. Marie Curie
   2. Berkley
   3. Lord Rudherford
   4. Maxwell
      
   
   
3. The mass of earth is ______ times the mass of mercury.
   
   
   
   1. 10
   2. 14
   3. 18
   4. 22
      
   
   
4. Each nakshatra is an angular region of about ______.
   
   
   
   1. 15° 30'
   2. 14° 40'
   3. 13° 20'
   4. 12° 30'
      
   
   

   SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 4]

   
   
5. What is the wavelength of visible light in meter ?
6. How is charcoal obtained from wood ?
7. What is corona ?
8. What is celestial sphere ?
   

   SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 6]

   
   
9. Mention two advantages and two limitations of solar cooker.
10. Explain the theory of formation of our solar system.
11. Explain the installation of artificial satellite by space shuttle.
    

    SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]

    
    
12. Mention six characteristics of ideal fuel.
13. Write a note on asteroids(six points).
    

    SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]

    
    
14. Write a note on Nuclear reactor with a neat diagram. OR Write a note on galaxy.