Quiz  /  Electric Energy Generation Utilization and Conservation Class 7...

  • 1. 
    Energy transformations occur when...

  • energy is created through conduction
  • energy changes from one form to another
  • two forces slide together that are touching
  • a chemical reaction takes place

  • 2. 
    Maria’s father started a fire in the fireplace. He crumpled some paper, lit a match, and soon the logs in the fireplace were burning. In this case, the stored chemical energy in the logs was changed into

  • electrical energy.
  • mechanical motion.
  • heat and light energy.
  • electrical and heat energy.

  • 3. 
    The rock in the picture is pushed over the edge and it begins to fall. Which type of energy conversion is taking place?

  • mechanical to heat
  • sound to mechanical
  • potential to kinetic
  • kinetic to potential

  • 4. 
    What energy conversion is taking place in this picture?

  • solar energy to thermal energy
  • thermal energy to chemical energy
  • chemical energy to thermal and light energy
  • All of above

  • 5. 
    How does the mass of a bowling ball that has been rolled down the lane affect the kinetic energy?

  • The kinetic energy does not depend on the mass of the bowling ball.
  • The kinetic energy is increasing proportional to the mass of the bowling ball.
  • The kinetic energy is decreasing proportional to the mass of the bowling ball.
  • The kinetic energy is increasing proportional to the square of the mass of the bowling ball.

  • 6. 
    Energy cannot be created or destroyed. It can only be changed from one form to another. This is known as the law of conservation of ___________:

  • mass
  • energy
  • temperature
  • Both A & B

  • 7. 
    Energy is the ratio of useful output energy to input energy.

  • true
  • false

  • 8. 
    As a roller coaster goes downhill

  • kinetic energy is converted into potential energy.
  • potential energy is converted into kinetic energy.
  • electrical energy is converted into potential energy.
  • potential energy is converted into electrical energy.

  • 9. 
    Which of the following best represents the Law of Conservation of Energy?

  • Energy CAN be created but NOT destroyed
  • Energy CAN be destroyed but NOT created
  • Energy can NOT be created Nor destroyed
  • Energy CAN be created and CAN destroyed

  • 10. 
    ________________ is the sum of an object's kinetic energy and potential energy. The energy that a car has while moving is __________________ energy, as in the energy a book has on top of a desk.

  • mechanical energy
  • sound energy
  • electromagnetic energy
  • chemical energy
  • thermal energy and heat

  • 11. 
    __________ is the energy an object has due to the motion of its molecules. The faster the molecules in an object move the more of this type of energy the object ha. Heat is the energy transferred from am object at a higher temperature to an object at a lower temperature.

  • mechanical energy
  • nuclear energy
  • electromagnetic energy
  • chemical energy
  • thermal energy and heat

  • 12. 
    __________ is the energy given off by the sun - hydrogen nuclei join to make a helium nucleus. This reaction gives off a huge amount of energy. The sun's light and heat come from these reactions. Without nuclear energy form the sun, life would not exist on Earth. When an atom's nucleus breaks apart, or when the nuclei of two small atoms join together, energy is released.

  • mechanical energy
  • nuclear energy
  • electromagnetic energy
  • chemical energy
  • thermal energy and heat

  • 13. 
    _______________ results from the vibration of particles. People are able to detect these tiny vibrations with structures in their ears that vibrate due to the sound. When you hear a car, you are detecing virbration sin the air that transfer __________ . it cannot travel through empty space. If there were no air or other substance between you and the car, then you would not hear _________ form the car.

  • mechanical energy
  • sound energy
  • electromagnetic energy
  • chemical energy
  • thermal energy and heat

  • 14. 
    When gasoline is burned in a car engine, ________ energy is converted into _________ energy.

  • heat, chemical
  • chemical, potential
  • mechanical, chemical
  • chemical, mechanical

  • 15. 
    What form of energy does a compressed spring have?

  • heat energy
  • kinetic energy
  • chemical energy
  • potential energy

  • 16. 
    __________ is transmitted through space in waves. These particular waves can be produced by vibration s of electrically charged particles. Unlike sound waves, these waves can travel through empty space. Some examples of this type of energy are: visible light, x-rays, and microwaves.

  • mechanical energy
  • nuclear energy
  • electromagnetic energy
  • chemical energy
  • thermal energy and heat

  • 17. 
    A change from one form of energy to another is known as:

  • energy conversion
  • chemical energy
  • solar energy
  • None of these

  • 18. 
    A ball is projected into the air. Where is potential energy the greatest?

  • (C) remain the same
  • (d) All of above
  • (B) increase
  • (A) decrease

  • 19. 
    __________ is the energy stored in bonds that hold compounds together. If a molecule's bonds are broken or rearranged, energy is released or absorbed, This type of energy can be store din food and in matches.

  • mechanical energy
  • nuclear energy
  • electromagnetic energy
  • chemical energy
  • thermal energy and heat

  • 20. 
    Muscles convert chemical energy into

  • light energy.
  • nuclear energy.
  • mechanical energy.
  • electromagnetic energy.
Report Question
warning
access_time
  Time