Not necessarily - though it depends what you mean by "always". Quite often, energy can remain in the same form for a long, long time.
No not always necessarily, when energy changes form it usually is lost in the form of heat.
Heat is always lost.
No, energy is not produced. The total amount of energy doesn't change.
Heat.
When energy changes form the molecules in the object become more or less densly packed. Thermal energy is also ALWAYS produced.
Some of the energy will usually be converted into an unusable form of energy, often as heat.
Usually some energy gets wasted, and converted into heat.
energy
It changes to another form.
On the contrary, energy frequently changes from one form to another.
It changes electrical energy to thermal energy and light energy
kinetic energy :)