Science - Energy

Home > Flashcards > Print Preview

The flashcards below were created by user mshowley on FreezingBlue Flashcards. What would you like to do?


  1. What is energy?
    This is the ability to do work or move something
  2. What unit is used to measure energy?
    Joule (J)
  3. What is work?
    This is done when a force moves a body
  4. What unit is used to measure work?
    Joules (J)
  5. How is work calculated?
    Work (J) = Force (N) x Distance (m)
  6. List the different types of energy
    • Potential Energy
    • Magnetic Energy
    • Sound Energy
    • Kinetic Energy
    • Chemical Energy
    • Nuclear Energy
    • Heat Energy
    • Light Energy
    • Electrical Energy
  7. What is heat energy?
    This is a form of energy that causes the temperature to rise when it is added
  8. What is light energy?
    This is a form of energy that travels in waves and is used to allow us to see things
  9. What is electrical energy?
    This is the energy carried by electric currents
  10. What is sound energy?
    This is caused by vibrations that pass through the air to you ear which allows us to hear
  11. What is chemical energy?
    This is the energy stored in the bonds between atoms

    This is stored in oil, gas and food
  12. What is potential energy?
    This is the stored energy just waiting to do work eg. water at the top of a waterfall
  13. What is gravitational potential energy?
    This is the energy stored when something is raised to a height
  14. What is elastic potential energy?
    This is the energy stored in objects that can be stretched or squashed 

    For examples when you pull back the string of a bow
  15. What is kinetic energy?
    This is the energy of a moving object
  16. What is the conservation of energy?
    This states that energy cannot be made or lost but it can change from one form to another
  17. State examples of energy changes that occur in every day life
    An electric kettle changes electrical energy into heat energy

    An electric bulb changes electrical energy into light energy

    A fire changes chemical energy into heat energy
  18. Explain renewable energy
    This is energy that can be used over and over again
  19. Give examples of renewable energy
    • Wind
    • Solar
    • Tidal
    • Wave
    • Hydro
  20. Explain non-renewable energy
    This is energy that cannot be used over and over again
  21. Give examples of non-renewable energy
    • Coal
    • Oil
    • Turf
    • Gas
  22. What are energy transfer diagrams?
    An energy transfer diagram shows the useful energy transfers taking place in a process
  23. What is a Sankey diagram?
    This shows all the energy transfers taking place in a process

    It is a more accurate way of showing energy transfers

    The thicker the arrow is, the more energy there is involved in the process
  24. What is dissipation of energy?
    This is when energy changes from a useful form to a not so useful form

    For example when you bounce a ball it loses height on each bounce as the energy is been converted into heat in the ball
  25. What is meant by efficiency?
    This is a measure of how close we can get to 100% energy transfer in a device
  26. What is power?
    This is the rate at which energy is transferred from one form to another
  27. What is the unit used to measure power?
    Watt (W)
  28. What is power rating?
    This is a measure of how much energy is transferred per second in a machine
  29. What is the unit used to measure electricity?
    kilowatt-hour (kWh)
  30. What is the BER rating?
    This shows how much energy a home uses

    This is called an energy rating

    The BER scale goes from A to G

    A is the best rating
  31. List ways in which we can save energy in our homes and schools
    • Put laggin jackets on hot water tanks
    • Insulate the attic
    • Have double glazed windows
    • Use carpets and curtains
    • Do not leave doors and windows open

Card Set Information

Author:
mshowley
ID:
150008
Filename:
Science - Energy
Updated:
2016-12-14 17:57:26
Tags:
Energy
Folders:

Description:
Energy
Show Answers:

What would you like to do?

Home > Flashcards > Print Preview