Science Week 9, Level G ,

16 Questions | Total Attempts: 75

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Science Week 9, Level G ,

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Questions and Answers
  • 1. 
    Objects that have ________ charges attract each other (one of the object is positively charged and the other is negatively charged).
  • 2. 
    Objects that have similar charges repel each other Two negatively charged objects will [_______] each other
  • 3. 
    A charged object can [__________] an uncharged object
  • 4. 
    For an object to become positively charged, its [_______] charges move towards another object
  • 5. 
    If you rub one balloon with a wool cloth, and the second balloon with a plastic wrap. The two balloons will [_______] each other.The balloon rubbed with the wool cloth will get a [_________] charge and the balloon rubbed with the plastic wrap will get a [________] charge, and since opposite charges attract the balloons will [__________] each other.
  • 6. 
    If you rub a ruler against your hair, the ruler attracts the negative charges and it get [________] charged. The negatively charged ruler is able to attract the neutral bits of paper because charged objects always [______] uncharged objects.
  • 7. 
    The energy of moving negative electric charges is called [______  ________].e.g. which allows a television to function properly
  • 8. 
    An object or a material that allows electric charges to move through it easily is a [__________]. e.g. copper, silver, steel, and tap water
  • 9. 
    An object that does not allow electric charges to move through them easily is an [________]. e.g. rubber, wood, plastic
  • 10. 
    The inside of the electrical wire is made of [________] which is a conductor, to be able to conduct the electric current. The outside is made of [_______] which is an insulator (so we do not damage ourselves when we hold the wire).
  • 11. 
    A lamp or a light bulb, converts electrical energy into [________] energy
  • 12. 
    A radio speaker or a buzzer converts the electrical energy into [_______] energy
  • 13. 
    When the alarm rings, the electrical energy is converted into [______] energy. The screen of the alarm clock converts, electrical energy into [_______] energy.
  • 14. 
    A toaster converts electrical energy into [_________] energy.
  • 15. 
    The ability to cause a change is called ________ such as light energy, electric energy, sound energy, chemical energy.
  • 16. 
    The main source of energy that humans need to do their daily activities is _________ energy in food
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