4 thermal energy on the move

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4 thermal energy on the move

  1. 1. Question of the Day Label the heat movement as conduction, convection or radiation. 1.Lava Lamp 2.Fire 3.Spoon in soup
  2. 2. Thermal Energy on the Move
  3. 3. <ul><li>Thermal energy travels as heat from higher temperature to low temperature. </li></ul><ul><li>3 Ways Thermal Energy can move </li></ul><ul><li>Conduction </li></ul><ul><li>Convection </li></ul><ul><li>Radiation </li></ul>
  4. 4. <ul><li>Conduction- the transfer of energy through matter by direct contact of particles. </li></ul><ul><li>Ex: Spoon in a pot of boiling water. The heat from the stove heats the pot which heats the water which heats the spoon. </li></ul>
  5. 6. <ul><li>2. Convection- the transfer of energy by the bulk movement of matter. </li></ul><ul><li>-This happens when fluid particles move from 1 location to another, carrying energy with them. </li></ul><ul><li>Ex: hot-air balloon </li></ul>
  6. 7. Hot water rises Cooler water sinks Cools at the surface
  7. 8. <ul><li>Radiation- the transfer of energy in the form of waves. </li></ul><ul><li>-Does not require matter. </li></ul><ul><li>Ex: Sun-rays </li></ul><ul><li>-Only radiant energy that is absorbed changes to thermal energy (heat). </li></ul>
  8. 9. There are no particles between the Sun and the Earth. ? RADIATION
  9. 11. <ul><li>Promoting Thermal Energy </li></ul><ul><li>Conductors- allow heat to move easily through them. </li></ul><ul><li>Ex: Metals </li></ul><ul><li> Solids </li></ul>
  10. 12. <ul><li>Reducing Thermal Energy </li></ul><ul><li>Insulators- do not allow heat to move easily through them. </li></ul><ul><li>Ex: Wood </li></ul><ul><li> Plastic </li></ul><ul><li> Glass </li></ul><ul><li> Gas </li></ul>
  11. 13. Label the heat movement as conduction, convection or radiation. 1.Lava Lamp 2.Fire 3.Spoon in soup Radiation Conduction Convection
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