Question

<!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}--> Discuss the composition of air.

Answer 1

<!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}--> Air is composed of different gases, water vapour, dust particles and smoke. [1 mark] The gases present in the air are 78% nitrogen, 21% oxygen and 1% other gases by volume which includes hydrogen, argon, and carbon dioxide. [2 mark]