Moisture, the higher level of moisture in the air, the higher level of humidity it is. That's why when you walk into a green house it's hot and humid, the higher level of moisture in the air can sometimes make it difficult to breathe, ie. in a steam room.
A tropical air mass typically causes hot and humid weather. This air mass forms over warm tropical regions and carries high levels of heat and moisture, leading to sultry and sticky conditions when it moves into an area.
Because water vapor is relatively light compared to O2 and N2, the mass of humid air is less per unit volume than of dry air. This makes humid air less dense and causes the buoyant force on it making it rise in dry air.
Humid air is more dense.
Yes, humid air is heavier than dry air because water vapor molecules in humid air add to its overall weight.
Humid air has more water vapor mixed in it than dry air has.
No, humid air is not a solvent. A solvent is a substance capable of dissolving other substances, while humid air is simply air with a high moisture content.
Surface water and moist soil are heated by the sun. This causes the water to evaporate and causes the air to become more humid. In just the same way that solid sugar will dissolve in water, liquid water will dissolve in air.
Yes, there is less oxygen in humid air compared to dry air.
Moisture (water droplets) is saturating the air when the weather is humid.
When the air is humid and the glass is cold.
Clouds form when humid air is cooled to its dew point, which causes water vapor in the air to condense into tiny water droplets or ice crystals that become visible in the sky. This process can be initiated by various mechanisms, such as rising air currents, cooling by contact with a cold surface, or mixing with colder air masses.
Warm air