Combustion. The carbon-matter and oxygen combust, releasing CO2, N, and heat.
Chemical energy to electrical energy.
Stored Chemical energy being converted to, and released as Heat energy.
friction, heat, kinematic
A burning candle produces thermal energy and light.
chemical
chemical
This kind of energy is called renewable energy.
its a kind of electric machine it works by electric power
Radiant and thermal
condensation and evaporation or potential to kinetic to heat is the kind of energy conversions sustain the water cycle
I would presume it would be chemical energy from burning fuel
Energy cannot be created. (Or destroyed) Burning changes the chemical energy of the wood to heat energy and light energy.