Term 1 Changes Around Us 3 Marks and 5 Marks Questions

8th Standard

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Science

Time : 01:00:00 Hrs
Total Marks : 40
    5 x 3 = 15
  1. Explain the role of yeast in making cakes and buns in a bakery?

  2. Burning of fossil fuels is responsible for global warming. Justify the statement.

  3. Is rusting good for Iron materials? Explain.

  4. Do all the fruits and vegetables undergo browning? Explain.

  5. Classify the following day to day activities based on chemical reactions by physical contact, solutions of reactants, heat, light, electricity and catalyst.
    a) burning of crackers during festivals
    b) Fading of coloured clothes on drying under sunlight
    c) Cooking of eggs.
    d) Charging of batteries.

  6. 5 x 5 = 25
  7. Explain how food items are spoiled by chemical reactions?

  8. Explain any three conditions that is required for a chemical reaction to take place. Give example.

  9. Explain the biological effects of chemical reactions

  10. Explain the environmental effects of chemical reactions.

  11. What are the effects produced during chemical reactions?

*****************************************

Reviews & Comments about 8th Science - Term 1 Changes Around Us 3 Marks and 5 Marks Questions

Write your Comment