8th Class Science Some Natural Phenomena Question Bank

done Some Natural Phenomena Total Questions - 35

• question_answer1)
  What is the force present between two charged bodies called?
  A)
   Electrostatic force done clear
  B)
                          Electromagnetic force done clear
  C)
                          Gravitational force done clear
  D)
                          Frictional force done clear
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• question_answer2)
  What happens when two bodies are rubbed against each other?
  A)
   They acquire equal and similar charges. done clear
  B)
                          They acquire equal and opposite charges. done clear
  C)
                          They acquire different charges but in different amounts depending upon their masses. done clear
  D)
                          They do not acquire any charge. done clear
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• question_answer3)
  Suppose you are in a car and there is a thunderstorm. Which of the following is the best way to protect yourself from possible harm?
  A)
   Remaining in the car done clear
  B)
                          Getting out of the car and taking cover under the car done clear
  C)
                          Running to a nearby tree done clear
  D)
                          Getting out and standing under an electric pole done clear
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• question_answer4)
  What is the S.I. unit of electric charge?
  A)
   Coulomb                             done clear
  B)
                          Ampere                              done clear
  C)
                          Volt                                       done clear
  D)
                          Watt                     done clear
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• question_answer5)
  What happens when an ebonite rod rubbed with fur and a glass rod rubbed with silk are brought near each other?
  A)
   They attract each other. done clear
  B)
                          They repel each other. done clear
  C)
                          Nothing happens to them. done clear
  D)
                          They acquire heat. done clear
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• question_answer6)
  What are lightning rods made up of?
  A)
   Copper                                done clear
  B)
                          Plastic                  done clear
  C)
                          Bakelite                               done clear
  D)
                          Sand paper done clear
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• question_answer7)
  What is the purpose of an electroscope?
  A)
   To detect and test small electric charges done clear
  B)
                          To calculate the amount of electric charge flowing through the conductor done clear
  C)
                          To find out the presence of antimatter done clear
  D)
                          To test the presence of magnetic field done clear
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• question_answer8)
  Why is a lightning conductor installed on a building?
  A)
   So that it collects the electric power present in the lightning done clear
  B)
                          So that it repels the lightning that falls on the building done clear
  C)
                          So that it forces the lightning to fall in an area where there are no buildings done clear
  D)
                          So that it conducts electric charge to the ground when lightning strikes the building done clear
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• question_answer9)
  What happens when a glass rod is rubbed with silk cloth?
  A)
   Electrons are added to it. done clear
  B)
                          Electrons are removed from it. done clear
  C)
                          Protons are added to it. done clear
  D)
                          Protons are removed from it. done clear
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• question_answer10)
  When you touch a charged body, the charge flows through you into the earth. What is this called?
  A)
   Induction                            done clear
  B)
                          Conduction        done clear
  C)
                          Capacitance       done clear
  D)
                          Earthing                              done clear
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• question_answer11)
  What is the nature of electrical charges generated by rubbing two objects?
  A)
   Static                                    done clear
  B)
                          Mobile                 done clear
  C)
                          Positive                               done clear
  D)
                          Negative done clear
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• question_answer12)
  Which layer of the earth is exposed to the atmosphere?
  A)
   Outer core         done clear
  B)
                          Mantle                done clear
  C)
                          Inner core          done clear
  D)
                          Crust                    done clear
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• question_answer13)
  Which fundamental particle in an atom has no charge?
  A)
   Electron                              done clear
  B)
                          Proton                 done clear
  C)
                          Neutron                              done clear
  D)
                          Both (A) and (B) done clear
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• question_answer14)
  When we remove polyester or woolen clothes in dark, we can see a spark and hear a crackling sound. Which of the following is responsible for it?
  A)
   Static electricity done clear
  B)
                          Current electricity done clear
  C)
                          Positive charge done clear
  D)
                          Negative charge done clear
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• question_answer15)
  Which of the following allows the transfer of electric charge from one charged object to another?
  A)
   Vacuum                              done clear
  B)
                          Air                         done clear
  C)
                          Insulator                             done clear
  D)
                          Conductor done clear
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• question_answer16)
  What is the lightning streaks that we see?
  A)
   UV rays from the sun done clear
  B)
                          Cosmic rays done clear
  C)
                          Accumulated electric charges done clear
  D)
                          IR rays from the sun done clear
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• question_answer17)
  Which of the following is the safest way to protect yourself from lightning?
  A)
   Run into an open field done clear
  B)
                          Open an umbrella for cover done clear
  C)
                          Take shelter under a tree done clear
  D)
                          Squat low on the ground done clear
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• question_answer18)
  Which of the following countries in the world is most prone to earthquakes?
  A)
   India                                     done clear
  B)
                          America              done clear
  C)
                          China                                    done clear
  D)
                          Japan done clear
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• question_answer19)
  What are high speed winds accompanied with?
  A)
   Increased pressure done clear
  B)
                          Reduced pressure done clear
  C)
                          Water vapour done clear
  D)
                          Static electricity done clear
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• question_answer20)
  By which of the following methods can c body be charged?
  A)
   Conduction        done clear
  B)
                          Induction                            done clear
  C)
                          Friction                                done clear
  D)
                          All of the above                               done clear
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• question_answer21)
  Which natural calamity cannot be predicted accurately in advance?
  A)
   Flood                                    done clear
  B)
                          Cyclone                               done clear
  C)
                          Earthquake        done clear
  D)
                          Famine                                done clear
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• question_answer22)
  What are the weak zones that are present around the boundaries of plates underneath the earth and cause slides and earthquakes commonly known as?
  A)
   Fault zones        done clear
  B)
                          Eruption zones done clear
  C)
                          Explosive zones               done clear
  D)
                          Sliding zones done clear
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• question_answer23)
  On which of the following scales is the magnitude of an earthquake measured?
  A)
   Celsius                                 done clear
  B)
                          Richter                 done clear
  C)
                          Fahrenheit         done clear
  D)
                          Both (A) and (B) done clear
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• question_answer24)
  In which of the following states is an earthquake most likely to occur?
  A)
   Gujarat                                done clear
  B)
                          Chhattisgarh     done clear
  C)
                          Chennai                              done clear
  D)
                          Kerala                  done clear
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• question_answer25)
  Which of the following is caused by electric sparks?
  A)
   Thunder                              done clear
  B)
                          Lightning                             done clear
  C)
                          Storm                                   done clear
  D)
                          Cyclone done clear
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• question_answer26)
  According to the law of electrostatics,
  A)
   a charged body attracts similar charged bodies but repels uncharged bodies. done clear
  B)
                          a charged body attracts bodies carrying similar charge and repels bodies possessing opposite charge. done clear
  C)
                          a charged body repels bodies possessing similar charge and attracts bodies with opposite charge done clear
  D)
                          a charged body attracts all types o charged bodies. done clear
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• question_answer27)
  Which of the following is/are affected during lightning?                 
  A)
   TV.                                        done clear
  B)
                          Radio                    done clear
  C)
                          Telephone         done clear
  D)
                          All of the above done clear
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• question_answer28)
  How is lightning useful to us?
  A)
   It helps in nitrogen fixation an promotes plant growth. done clear
  B)
                          Ozone is formed which prevent ultraviolet rays falling on the earth. done clear
  C)
                          It helps in the evolution of a new species. done clear
  D)
                          All of the above done clear
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• question_answer29)
  What happens when water vapour changes to liquid in the form of rain drops?
  A)
   Heat is absorbed. done clear
  B)
                          Heat is released. done clear
  C)
                          Heat is first absorbed and then released. done clear
  D)
                          There is no release of heat. done clear
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• question_answer30)
  Which of the following statements is NOT true?
  A)
   Lightning and sparks from woollen clothing are essentially the same phenomena. done clear
  B)
                          When you rub a plastic scale on dry hair, it acquires charge. done clear
  C)
                          A glass rod when rubbed with silk acquires negative charge. done clear
  D)
                          Static charges are called so, because they do not move by themselves. done clear
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• question_answer31)
  Which of the following makes the outermost layer of the earth fragmented?
  A)
   Crust                                    done clear
  B)
                          Plate                     done clear
  C)
                          Core                                     done clear
  D)
                          Inner zone done clear
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• question_answer32)
  Earthquakes at two places M and N were measured as 2 and 4. How is the magnitude and their destructive energy at M and N related?
  A)
   Tremor at N is strong as that at place ?M? done clear
  B)
                          Tremor at N is four times stronger than that at place 'M?. done clear
  C)
                          Tremor at N is 100 times stronger than that at place 'M?. done clear
  D)
                          Tremor at N is 1000 times stronger than that at place ?M?. done clear
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• question_answer33)
  Where is the crust of the earth the thickest?
  A)
   At the continents done clear
  B)
                          At the ocean done clear
  C)
                          At the poles done clear
  D)
                          Near faults done clear
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• question_answer34)
  Which of the following events can cause an earthquake?  

  (i) Movement of earth?s plates

  (ii) Volcanic eruption

  (iii) Underground nuclear explosion

  A)
   Only (i) and (ii) done clear
  B)
                          Only (ii) and (iii)               done clear
  C)
                          Only (i) and (iii)                done clear
  D)
                          (i), (ii) and (iii) done clear
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• question_answer35)
  On what factors does the response of the rock to stress depend?

  (i) Its temperature

  (ii) The speed of stress applied

  (iii)  The confining pressure on the rock

  A)
   Only (i) and (ii) done clear
  B)
                          Only (ii) and (iii)               done clear
  C)
                          Only (i) and (iii)                done clear
  D)
                          (i), (ii) and (iii) done clear
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