Atmospheric Water Vapour and its Forms Quiz

Atmospheric Moisture

• The actual amount of water vapor present in the atmosphere is referred to as absolute humidity.

Atmospheric Capacity

• The percentage of moisture present in the atmosphere compared to its full capacity at a given temperature is called relative humidity.

Sources of Atmospheric Moisture

• Moisture in the atmosphere is derived from various sources, including evaporation from oceans, lakes, and rivers, as well as transpiration from plants.

Factors Affecting Air's Water-Holding Capacity

• The ability of air to hold water vapor depends on its temperature.

Forms of Water in the Atmosphere

• Water is present in the atmosphere in three forms: water vapor, cloud droplets, and ice crystals.

Measuring Atmospheric Moisture

• The weight of water vapor per unit volume of air is expressed as absolute humidity.

Evaporation Temperature

• The temperature at which water starts evaporating is referred to as the evaporation point.

Phase Transitions

• The transformation of water vapor into water is called condensation.
• The transformation of water vapor directly into ice is called deposition.
• The term for condensation directly into solid form is deposition.

Evaporation and Condensation

• Evaporation of water is caused by an increase in temperature and a decrease in humidity.
• Condensation takes place when the air is cooled to its dew point.
• Condensation around very small particles, known as hygroscopic condensation nuclei, is caused by the presence of these particles.

Factors Affecting Air's Water Absorption Capacity

• An increase in water absorption and retention capacity of a given parcel of air is caused by an increase in temperature and humidity.

Influencing Factors of Atmospheric Conditions

• The volume of air, temperature, pressure, and humidity influence the atmospheric conditions.