Energy Stores

• What is a fundamental idea in physics regarding physical processes?


  Almost all physical processes involve a change in energy.
• Why is the concept of energy change important in physics?


  It is a recurring theme that will be revisited throughout the subject.
• How does a runner demonstrate a change in energy?


  A runner needs energy to move, and as they gain speed, there is a change in energy.
• What happens to energy when a light bulb illuminates?


  There is a change in energy inside the bulb when it lights up.
• What energy change occurs when cooking food?


  Energy is needed to heat up food, causing a change in energy in the food.
• What is an energy store?


  An energy store is a form in which energy can be held by an object.
• What is kinetic energy?

  Kinetic energy is the energy held by an object that is moving.
• How does the speed of an object relate to its kinetic energy?


  The faster an object is moving, the more kinetic energy it has.
• What happens to kinetic energy when an object slows down?


  This energy is transferred elsewhere, and once it stops, it no longer has kinetic energy.
• What is gravitational potential energy (GPE)?


  Gravitational potential energy is the energy gained by an object as it gains height.
• How does the height of an object affect its gravitational potential energy?


  An object higher up has more gravitational potential energy than one on the ground.
• What typically happens to gravitational potential energy when an object falls?


  This energy is usually transferred to kinetic energy as the object falls.
• What is elastic potential energy?

  Elastic potential energy is the energy held by an object that has been stretched.
• What happens to elastic potential energy when a stretched elastic band is released?


  It suddenly changes to kinetic energy, making the band fly off.
• What is thermal energy?


  Thermal energy is the energy held by an object that has been heated or worked on.
• What happens to an object's temperature when heat is supplied to it?


  The object's temperature rises when heat is supplied.
• What is electrostatic energy?


  Electrostatic energy is the energy stored in an electrostatic field.
• How is electrostatic energy different from energy carried by an electric current?


  Electrostatic energy is associated with forces from charged objects, not the current itself.
• What is magnetic energy?


  Magnetic energy is the energy stored in a magnetic field.
• What can happen to objects in an electrostatic or magnetic field?


  They can start moving due to the attractive or repulsive forces, indicating energy transfer.
• What is chemical energy?


  Chemical energy is the energy stored in chemical bonds between atoms.
• How can chemical energy be released?


  It can be released through chemical reactions.
• What is nuclear energy?


  Nuclear energy is the energy stored in the nucleus of an atom.
• When is nuclear energy released?


  It is released when a nucleus is split apart.
• What should students be able to do regarding energy stores for their exam?


  Students should understand the different energy stores and identify which are involved in energy transfers.
• What are some non-stored types of energy mentioned?


  Sound waves and light waves are examples of non-stored types of energy.
• How do sound waves transfer energy?


  Sound waves transfer energy as vibrations in matter.
• How does a megaphone demonstrate energy transfer?


  A megaphone takes chemical energy from a battery and sends it away as a sound wave.
• How do light waves transfer energy?


  Light waves transfer energy as radiation.
• How does a torch demonstrate energy transfer?


  A torch transfers energy from a battery away as a light wave.
• What are the types of energy stores discussed in the material?

  • Kinetic energy
  • Gravitational potential energy (GPE)
  • Elastic potential energy
  • Thermal energy
  • Electrostatic energy
  • Magnetic energy
  • Chemical energy
  • Nuclear energy
• What are the differences between stored and non-stored types of energy?


  Stored types of energy:

  • Kinetic energy
  • Gravitational potential energy
  • Elastic potential energy
  • Thermal energy
  • Electrostatic energy
  • Magnetic energy
  • Chemical energy
  • Nuclear energy

  
  

  Non-stored types of energy:

  • Sound waves
  • Light waves
• What are the processes involved in energy transfer?


  1. Energy changes occur in physical processes.
  2. Energy can be transferred between different stores.
  3. Non-stored types of energy can also transfer energy.
• What resources are available for GCSE Physics revision?


  • Launchpad learning platform
  • Interactive quizzes
  • Easy-to-follow videos
  • AI tutor support