heating and cooling - science

• when a force moves and object or deforms it energy is transferred between stores. The amount of work dependes on the size of the force and the distance the object moves from its original position (or displacemen)
• convection is when hot air rises and cold air sinks
• conduction is when heat moves through solids, liquids or gases by vibration of particles
• work done (joules) = force (newtons) x distance (metres)
• gravitational energy

  Gravitational energy is the energy that an object stores due to its height above the ground
• Potential energy

  Potential energy is energy that is stored in an object due to its position, properties, and forces acting on it
• Light energy

  Light is an energy source that travels in waves and lets us see the world around us
• chemical energy

  Chemical energy is energy that's stored in the bonds of atoms and molecules
• heat energy

  Heat energy is the result of the movement of tiny particles called atoms, molecules or ions in solids, liquids and gases. Heat energy is a form of energy that flows from hot objects to cool objects
• elastic energy 


  Elastic potential energy, which is the energy stored in something when you push, pull, or force it out of shapeElastic energy, or elastic potential energy, is the energy that's stored in an object when it's temporarily deformed by stretching, squeezing, or twisting
• good conductors

  metals, non metals
• poor conductors

  vacuum, liquids, gases
• why are liquids and gases poor conductors?

  this is because particles are much further apart compared to solids
• heat changes form of a material irreversibly, for example, heating an egg on a frying pan will cause the egg to change completely. This is a permanent change.
• Objects that radiate heat will release it to the surroundings. As he enters the air of the house. Hot air rises and cold air Falls. The attic of the house contains insulators, which will reduce heat loss. Windows of the house are double glazed, which will cause heat to transfer slowly to transfer heat through windows heat must conduct then convect this will reduce heat loss. Other way to reduce heat loss is by insulating walls and filling gaps under doors.