GCSE Combined Science (AQA)

622 videos | 38 hours

Energy Energy changes in a system, and the ways energy is stored before and after such changes

Heat Flow

2:06 Energy, Systems and How to Transfer Energy
Spec 4.1.1.1
Previous Systems Next Forces & Work
  • Heating is the process of transferring thermal energy from one object to another.
  • Thermal energy is transferred from a hotter object to a colder object when they are in contact.
  • Heat flow occurs due to a difference in temperature between two systems.
  • Thermal energy is transferred until the temperatures of the two systems are the same.
  • A warm object will gradually lose energy to its surroundings due to heat flow.
  • Heat flow causes a drink to cool and a house to cool down as heat is lost to colder surroundings.
  • In summer, houses stay warm as the surroundings are warm, reducing heat flow.
  • Heating devices work by increasing their thermal energy to transfer heat to objects they contact.
  • Heating devices use energy from fuels or an electrical supply to increase thermal energy.
  • A radiator heats a room by transferring heat from hot water to the air.
  • A kettle heats water by using a heating device to raise the temperature, causing heat flow into the water.

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