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.

Test your knowledge about the presence of water vapour in the atmosphere, its role in weather phenomena, and the three forms in which water exists in the atmosphere. Explore the exchange of water between the atmosphere, oceans, and continents.