heating and cooling

• What is temperature a measure of?

  How hot something is
• What is heat a measure of?

  Thermal energy store in joules
• What is conduction?

  Movement of heat through a solid
• What is convection?

  Transfer of heat in liquids and gases
• What is radiation?

  Heat energy transferred by a wave
• What does it mean to emit?

  To give out
• What does it mean to absorb?

  To take in
• What is an insulator?

  A material that does not transfer heat well
• What is a conductor?

  A material that allows heat to pass through
• What is density?

  Mass of a substance in a volume
• What have you learned before this topic?

  • 8 energy stores
  • Energy transfer and dissipation
  • How waves transfer energy
• What will you learn next in this topic?

  • Calculate values for energy stores
  • Determine efficiency of electrical appliances
  • Ways to insulate a home
  • Effectiveness of methods at reducing heat loss
• How do temperature and heat differ?

  Temperature measures how hot something is
• What affects the heat of a material?

  The energy of the particles it contains
• How does the number of particles affect thermal energy?

  More particles mean more thermal energy
• What happens to objects that emit infrared radiation?

  Hotter objects emit more radiation
• How does radiation travel?

  It can travel through a vacuum
• What effect does color have on radiation absorption?

  Darker colors absorb and emit more radiation
• How does conduction transfer thermal energy?

  Through particle collisions in solids
• What happens to particles during conduction?

  They increase in kinetic energy when heated
• What occurs during convection?

  Hot particles move and replace cooler ones
• How is thermal energy transferred in convection currents?

  From hot places to cold places