Which of the following sources of energy are not derived from the sun?
Biomass, Wind, Ocean thermal energy, Geothermal energy, Nuclear fuels, Hydroelectricity, Wave energy, Coal, Petroleum, Tidal energy.

The term Geothermal is derived from the two Greek words, 'Geo' meaning "earth" and 'thermal' meaning "heat". Geothermal energy is the heat produced deep in the Earth's core, due to which it is a clean, renewable source of energy that can be harnessed for use as heat and electricity.

The heat in the core is produced mainly by the radioactive decay of potassium, thorium, and uranium in Earth’s crust and mantle and also by friction generated along the margins of continental plates.

Nuclear fuel is a material used in nuclear power stations to produce heat to power turbines, which is created when nuclear fuel undergoes nuclear fission.

Hydroelectricity is obtained from the potential energy of water stored at a height.

Energy obtained from the burning of coal is used in the thermal power plant, to produce electricity.