No. Temperature is a measurement of atomic or molecular movement.
If you have a difference in temperature between two things, you could use the difference, (and reducing the difference) to get energy,
To put it simply, if you have a hot item and a cold item, you can take the difference to make electricity.
If you are in a desert, and everuthing has the same temperature, you can't.
Similarly, the weights on a clock gives energy to the movement of the clock, until they reach the floor, then all the potential energy has been transformed into kinetic (movement) energy in the clock, and finally to heat due to friction.
Friction
Then there is not as much thermal energy and the temperature is lower.
The sun
Fusion...
Assuming you are asking for source - that would be the sun.
Not really. Even endothermic (energy absorbing) processes that appear to have no energy source take that energy from their environment. This can often be measured as a temperature drop.
No. Geothermal energy is energy based on the temperature of something below the surface of the earth, such as the hot water that creates geysers.
It's temperature rises according to the heat source.
They both have something to do with thermal energy.
no, the energy came from an external source most likely.
If a chemical reaction absorbs energy in order to be complete, the reaction will not occur in the absence of a source of energy. However, note that any environment substantially above absolute zero temperature contains potential energy, and this may be sufficient for the reaction, without requiring any spectacular specific energy source.
Thunderstorms are most likely to form during warm weather. In simple terms, the heat is their source of energy.