Discuss in class the question of what is the ultimate source of energy for bio-mass, wind and ocean thermal energy.
✅Answer: The ultimate source of energy for biomass, wind and ocean thermal energy is Sun.
Is geothermal energy and nuclear energy different in this respect? Why?
✅Answer: Yes. In geothermal energy & nuclear energy, the ultimate source is nuclear material.
Where would you place hydroelectricity and wave energy?
✅Answer: The ultimate source of energy of hydroelectricity is the potential energy of water. For wave energy, it is Sun because waves are formed due to wind and wind is formed due to unequal heating of air by Sun.