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Sun radiates light and heat. Photovoltaic panel and solar heaters function (work) with solar energy.
Our bodies get energy from the food we eat.
We use coal as a fuel to produce electric energy and heat.
Oil is used to heat our house, on energy factories and to move ships and cars.
Biomass is used for heat and cooking at villages and � for heating greenhouses and oil mills.
Gas is used as fuel in many factories instead or oil, in transportation and for heating reasons.
We convert air kinetic energy to electric energy by�using wind turbines.
Kinetic energy of water is used to produce electric � energy by hydroelectric plants.
Geothermal energy is used for heat and to power up many factories.
Nuclear energy is transformed to electric energy at nuclear power plants.
Sun, food, coal, biomass, oil, gass, wind, water, geothermal sources and nuclear fission are energy sources.
άνεμος
γαιάνθρακας
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Νερό που πέφτει�από ψηλά
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τρόφιμα
υγραέριο
wind sun food gas
wind coal sun water
Which energy source is necessary in every case?
What are the energy sources that your devices need in order to function every day? Give some examples.
Most of the devices need eclectic power to function. So, electricity comes from burning coal or oil or by hydroelectric plants. Such devices are the PC, the hair dryer and the radio.
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