Yes, it is normal.
Yes, this water is evaporated.
Yes, fluoride can evaporate from water when it is heated.
Steam
Evaporate?
It evaporates
At higher temperature the continuous movement of water molecules is accelerated.
This is not true.
Yes, it is true.
Indoor the temperature is higher.
Eventually if heated long enough (and hot enough) all the water would either eat the world or MELT (turning into steam), leaving behind nothing but solid salt behind. This is one way that you can remove salt from sea water in fact.
Yes Water can evaporate inside. Have you ever taken a really hot shower and then your mirror fogs up? That's because the water was hot enough to evaporate then condensed on your mirror.
When water is heated a physical change may take place. The water may evaporate and become water vapor, but the chemical makeup of the water (H2O) will not change.