Energy transformation. Law of Conservation of Energy The Law of conservation of energy says that energy is never gained or lost, it just changes form.

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Presentation transcript:

Energy transformation

Law of Conservation of Energy The Law of conservation of energy says that energy is never gained or lost, it just changes form.

Energy conversion Any type of energy can be changed into any other type of energy if you have the right tools.

Light energy to chemical energy Plants use chloroplasts to turn light energy into chemical energy

Chemical energy to mechanical energy We use mitochondria in our cells to convert chemical energy into mechanical energy

Other types of energy conversion Radios convert electromagnetic energy (light energy) to sound energy. Cell phones can convert sound to light or light to sound Specialized floor tiles can convert kinetic energy from footsteps into electrical energy.

Electricity generation Our world today runs on electric energy. We have developed many ways to convert other types of energy into electricity: – Fossil fuels – Solar power – Wind power – Nuclear power – Geothermal power – Hydroelectric power

Heat energy to electrical energy Heated water can form steam which can be used to spin a turbine (kinetic energy), which then produces electricity (electrical energy), which can then be used to light your house (light energy), spin your fan (kinetic energy,) heat your oven (heat energy) etc…

Energy conversion by the numbers How much energy gets to your house? 3000 Joules of energy produced 600 Joules lost as heat to surroundings 200 Joules lost as heat from friction 100 Joules lost as heat from friction 500 Joules lost at heat from friction due to electricity transfer

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