8th Class Science Sample Paper

done Science Sample Paper-6 Total Questions - 37    [Download]

• question_answer1)

  Choose the correct options:

  (i) Sulphurous acid turns blue litmus paper into:

  A)
  Blue                 
  done clear
  B)
  Red
  done clear
  C)
  Neutral                  
  done clear
  D)
  No reaction
  done clear
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• question_answer2)

  Choose the correct options:

  (ii) Petroleum was formed from organisms:

  A)
  Living on the land          
  done clear
  B)
  Living in the sea
  done clear
  C)
  Living on the plants        
  done clear
  D)
  Living on the rocks
  done clear
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• question_answer3)

  Choose the correct options:

  (iii) In villages, people use wood as fuel because

  A)
  it is considered to be an ideal fuel
  done clear
  B)
  of its easy availability and low cost.
  done clear
  C)
  it is environment friendly.
  done clear
  D)
  it catches fire easily.
  done clear
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• question_answer4)

  Choose the correct options:

  (iv) What do black buck, elephant, python and golden cat together represent in a forest?

  A)
  fauna  
  done clear
  B)
  ecosystem
  done clear
  C)
  flora                             
  done clear
  D)
  species
  done clear
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• question_answer5)

  Choose the correct options:

  (v) Which one of the following terms is not a part of the nucleus?

  A)
  ribosomes
  done clear
  B)
  chromosomes
  done clear
  C)
  nucleolus              
  done clear
  D)
  cytoplasm
  done clear
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• question_answer6)

  Choose the correct options:

  (vi) Reproduction by budding takes place in

  A)
  hydra     
  done clear
  B)
  amoeba
  done clear
  C)
  paramecium                  
  done clear
  D)
  bacteria
  done clear
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• question_answer7)

  Choose the correct options:

  (vii) For the metamorphosis of tadpoles; which of the following elements must be available in water?

  A)
  Chlorine           
  done clear
  B)
  Carbon
  done clear
  C)
  Sulphur                        
  done clear
  D)
  Iodine
  done clear
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• question_answer8)

  Choose the correct options:

  (viii) Which one of the following forces is a contact force?

  A)
  force of gravity              
  done clear
  B)
  force of friction
  done clear
  C)
  magnetic force               
  done clear
  D)
  electrostatic force
  done clear
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• question_answer9)

  Choose the correct options:

  (ix) To sharpen the blade of a knife by rubbing it against a surface, which of the following will be most suitable?

  A)
  Stone              
  done clear
  B)
  Plastic block
  done clear
  C)
  Wooden block
  done clear
  D)
  Glass block
  done clear
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• question_answer10)

  Choose the correct options:

  (x) An electric current can produce

  A)
  heating effect only
  done clear
  B)
  chemical effect only
  done clear
  C)
  magnetic effect
  done clear
  D)
  chemical, heating and magnetic effect
  done clear
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• question_answer11)
  (i) "Cells are the basic structural units of living organisms." Explain.
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• question_answer12)
  (ii) What is the purpose of tail in the sperm?                                                                                              
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• question_answer13)
  (iii) Which force is responsible for wearing out tyres of motor vehicles?                                                                      
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• question_answer14)
  (iv) What is a drag?                                                                                                                               
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• question_answer15)
                                                                     (v) What is ultrasound?                                                                                                                          
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• question_answer16)
  (vi) Explain why a layer of zinc is coated over iron.                                                                                    
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• question_answer17)
  Write any three positive characteristics of plastic.
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• question_answer18)

  Give reason:

  (i) Sulphuric acid is poured on copper plate.

  (ii) Write word equation of the reaction involved.

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• question_answer19)
                                                                                                                                     It is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain.                                       
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• question_answer20)
  Explain how deforestation leads to reduced rainfall.                                                                                                
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• question_answer21)
  Draw binary fission in Amoeba.                                                                                                               
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• question_answer22)
  Name the virus that causes AIDS. What are the mediums through which this virus is transmitted?
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• question_answer23)
                                                                                                                                      An astronaut travels from the earth to the moon. How do its weight and mass change?                       
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• question_answer24)
  What is the cause of friction?                                                                                                                   
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• question_answer25)
  Compare the sound of drum and whistle.                                                                                      
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• question_answer26)
  Why do we not hear the sound of an explosion on the surface of the moon?                                                  
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• question_answer27)

  Give reason:

  Water is not used to control the fire involving electrical appliances or equipment.

                                                 
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• question_answer28)

  Once in a village, there was a fire in a hut. When a lot of dry powder of a substance, A was released over the fire, the fire got extinguished.

  (i) Name the substance A.

  (ii) How does the substance extinguished fire?

  (iii) Give another substance which behaves like substance A.

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• question_answer29)
  Draw a sketch of animal cell and plant cell showing differences between them.                                               
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• question_answer30)

  Give reason.

  Sportsmen use shoes with spikes.

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• question_answer31)
                                                                                                              What are three main factors essential to maintain reproductive health? Explain their importance.
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• question_answer32)
                                                                                                                                                  Draw structure of virus and amoeba.                                                                                                        
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• question_answer33)
  Draw a well labelled diagram of ultra-structure of Nucleus.                                                                           
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• question_answer34)
  Corrosion is a serious problem. Every year an enormous amount of money is spent to replace damaged iron. What steps can be taken to prevent this damage?                                                                                                     
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• question_answer35)
  What are food preservatives? Explain some common food preservatives.                                           
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• question_answer36)
  What are the major groups of micro-organisms?                                            
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• question_answer37)
                                                                                                                                                  Explain how fertilizers are different from manures?                                                                                      
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