Air and Water

Air is a mixture of gases

Air is a mixture of gases. Dry air contains mainly nitrogen and oxygen, along with argon, carbon dioxide, and inert gases. Water vapour is not fixed b

Oxygen is the active gas

Oxygen is the active gas in air. It supports respiration and combustion, dissolves in water, and is used in medicine, industry, and rockets as liquid

Nitrogen is the non

Nitrogen is the non-active major gas in air. It is the main constituent of proteins and helps slow down the rapid oxidation caused by oxygen.

Carbon dioxide is a small but

Carbon dioxide is a small but important part of air. Plants use it in photosynthesis. It is also used in food preservation, dry ice, soft drinks, and

Water vapour enters air by evaporation

Water vapour enters air by evaporation and changes with place, season, and climate. Relative humidity compares the water vapour actually present with