What is Moisture?
Moisture refers to the presence of a liquid in trace amounts. Generally, moisture is directed with water when small amounts of water may be found in different aspects. Moisture can also vaguely refer to the water vapor present in the air. The tiny droplets of water can be in the air on a surface or in the ground. Moisture can vaguely represent anything that moistens, that is, makes something damp or wet due to fluids in small quantities.
What is humidity?
Humidity specifically refers to the amount of water vapor present in the air. If there is a lot of water vapor in the air the humidity levels will be high and if there is very less water vapor in the air the humidity levels will be low. The higher the humidity, the wetter the air feels as naturally, there is more water present.
Relative humidity refers to the amount of water vapor actually present in the air, expressed as a percentage of the maximum amount of water vapor the air can hold at the same temperature.
People generally sweat in areas of high humidity as the sweat is not absorbed by the surrounding air since it is already saturated. Humidity also gives rise to mould and can cause malfunction in household items like electronics. Living with humidity can be made easier with the aid of a dehumidifier, which sucks moisture out of the air.
Humidity vs Moisture:
Humidity simply refers to the vapor content measurement when the liquid is in the for of a gas, while moisture refers to the content of the solution when it is in liquid state.
If the air in an environment reaches a state of saturation in humidity which refers to the state in which the air can not absorb any more water in gas state, the water will condense into tiny drops that create mist, fog and clouds which are in the form of moisture.
Humidity is specific only to the relation of the amount of water present in the air while moisture can be a much broader term that refers to the level of liquid present in a solid substance like food items, soil, products etc.
For example: It is generally said that the humidity levels in the climatic conditions of a certain area can be high or low. In such a case the term moisture is not frequently used. However, in case of referring to the dampness of soil, it is commonly said that the moisture level of the soil is high or low and in such a case the term humidity is not used.
Moisture can generally be seen as well as be felt by people as it exists in visible solid substances while humidity can not be seen but can only be felt as it is present in the air.
While the two terms may have a few similarities, they are scientifically as well as grammatically different and can hence not be used interchangeably.