Which gas is responsible for the characteristic smell often associated with rain after a dry spell?

Which optical phenomenon creates the illusion of water on a hot road surface during sunny days?

Which device measures atmospheric pressure and is commonly used for weather forecasting?

Which scientific principle explains why objects float or sink in a fluid?

Which vitamin deficiency causes pellagra characterised by dermatitis diarrhoea and dementia?

Which white blood cell type is primarily responsible for producing antibodies against pathogens?

Which renewable energy source harnesses heat stored inside the Earth to generate electricity?

Which tiny blood vessels allow the exchange of oxygen nutrients and waste between blood and body tissues?

Which part of the human ear converts sound vibrations into electrical signals for the brain?

Which everyday substance when mixed with water forms a solution that conducts electricity?

Which biological process allows water to move across a cell membrane from a region of low solute concentration to high concentration?