Energy basics
Temperature  and Heat <ul><li>Temperature and heat are  NOT THE SAME. </li></ul>
Temperature <ul><li>How hot or cold it is. </li></ul><ul><li>Measured in  degrees Celsius .  </li></ul>
Heat <ul><li>The amount of thermal energy, measured in  joules or J .  </li></ul>A cup of hot tea has  heat energy  in the...
A swimming pool at 30°C is at  a lower temperature  than a cup of tea at 80°C. BUT the swimming pool contains  more water,...
The small beaker of water boils first <ul><li>The large beaker contains more water and  needs more thermal energy or heat ...
<ul><li>Chemical energy  stored in it is transferred to the surroundings as  thermal energy ,  sound energy  and  kinetic ...
<ul><li>Sound energy  can be transferred to your eardrum as  kinetic energy  (movement energy).  </li></ul>
<ul><li>The battery  transfers  stored  chemical  energy  as  electrical  energy . The electrical energy is transferred to...
Energy transfer
The Law of Conservation of Energy <ul><li>Energy is always conserved, it is never &quot;lost&quot; or &quot;wasted“. </li>...
Sankey diagrams
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Energy transfer

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Energy transfer

  1. 1. Energy basics
  2. 2. Temperature and Heat <ul><li>Temperature and heat are NOT THE SAME. </li></ul>
  3. 3. Temperature <ul><li>How hot or cold it is. </li></ul><ul><li>Measured in degrees Celsius . </li></ul>
  4. 4. Heat <ul><li>The amount of thermal energy, measured in joules or J . </li></ul>A cup of hot tea has heat energy in the form of kinetic energy from its particles.
  5. 5. A swimming pool at 30°C is at a lower temperature than a cup of tea at 80°C. BUT the swimming pool contains more water, so it stores more thermal energy or heat.
  6. 6. The small beaker of water boils first <ul><li>The large beaker contains more water and needs more thermal energy or heat to reach 100°C. </li></ul>
  7. 7. <ul><li>Chemical energy stored in it is transferred to the surroundings as thermal energy , sound energy and kinetic energy . </li></ul>
  8. 8. <ul><li>Sound energy can be transferred to your eardrum as kinetic energy (movement energy). </li></ul>
  9. 9. <ul><li>The battery transfers stored chemical energy as electrical energy . The electrical energy is transferred to the surroundings by the lamp as light energy and thermal energy (heat energy). </li></ul>
  10. 10. Energy transfer
  11. 11. The Law of Conservation of Energy <ul><li>Energy is always conserved, it is never &quot;lost&quot; or &quot;wasted“. </li></ul><ul><li>Some energy transfers are useful and some are not. </li></ul>
  12. 12. Sankey diagrams

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