Key Questions: |
- How is energy transferred? Name 4 examples.
- Processes that involve Energy transfer:
- changing motion,
- dropping an object,
- completing an electrical circuit,
- stretching a spring,
- metabolism of food,
- burning fuels
- Does energy always stay in the same form? Explain your answer.
- Energy can be transformed from one form to another.
Usually into more than one form.
- What is meant by 'conservation of energy'?
- Energy cannot be created or destroyed but can be transformed or transferred from place to place.
- Why do we use energy transfer diagrams? Draw an energy transfer diagram for the energy transfers in a fan heater.
- Energy transfer diagrams are used to transfers (and transforms) of Energy.
Energy transfer diagrams:
- Stores of Energy are written in boxes.
- Flows of Energy are written on arrows.
- Places / objects are written at the end of arrows.
- The final arrows need to point word 'surroundings'
- Which direction(s) does energy flow?
- Energy flows from high Energy (the store) to areas of low Energy (the surroundings).
- How is energy dispersed?
- When Energy is transferred it is always dispersed until it is evenly distributed in all places.
- How does anything happen in terms of energy?
- We harness the flow of Energy from an area of high concentration to an area of low concentration.
Analogy: water wheel
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