Energy.’ ⚡️

• Give the 5 Energy Stores and what is meant by them⚡️ ྀིྀི 


  Kinetic : Moving object

  Gravitational potential : An object above the ground

  Elastic potential : objects stretched, squashed or bent

  Thermal : Hot objects

  Chemical : Foods, batteries and fuels
• What does the law of Conservation of Energy state? 👩‍⚖️ ྀིྀི 


  Energy cannot be created or destroyed, only stored or transferred
• What does conserved mean? ✋🏼ྀིྀི 


  Energy stays the same
• What can be used to represent energy?

  Cups ⬇️

  
• What is meant by when energy is transferred from a hotter object to a colder object until they reach the same temperature? 🤒 ྀིྀི 


  Thermal equilibrium
• What happens when Energy in the Thermal Energy Store is increased or Decreased?

  
• When is the Energy in Food released?

  When you digest it
• When is the Energy in fuels released?

  Combustion/ When they are burned
• Give three examples of fuels

  Burning Oil,Gas,Coal or wood
• What is the standard unit of Energy?


  Joules
• What can burnt energy be used for?

  Heat e.g cooking
• Any energy that isn't burned off is stored as what?

  Fat
• What does dissipation mean?

  When energy is transferred to the thermal energy store of it’s surroundings
• What is power?


  A measurement of how quickly energy is transferred
• What are the standard units for power?

  Watts
• What is the equation for power?


  Power(W) = Energy (J) / Time (S)
• A device with a larger power transfers more/less energy per second?

  More
• What are the two types of energy transfers?


  Useful and Wasteful
• Where does dissipation occur?

  In every energy transfer
• How do solids transfer energy?

  Conduction
• How does conduction work?


  Transfer of heat through direct contact between particles.
• Give examples of good conductors


  metals
• Give examples of insulators


  Rubber and wood
• How do liquids and gases transfer energy/heat?


  Convection
• How does convection work?


  The bottom particles are heated, then rise to the top allowing the colder ones to drop to the bottom, heating them up too until the whole liquid/ gas is heated
• What is Infrared radiation?

  When energy is transferred without particles
• How does infrared radiation work?


  Hot objects emitting heat in all directions e.g the sun
• What colours absorb more heat?

  Dark colors
• What is work done?


  When a force causes an object to move
• What is the equation for work done?

  Work(J) = Force(N) x Distance(M) = (Energy transferred)
• How long do fossil fuels take to form?


  Millions of years.
• Where are fossil fuels burned?

  In power stations to produce electricity, along with carbon dioxide to heat up the planet
• What happens to solid particles when they are heated?

  They vibrate more vigorously