What happens to viscosity of water and air when subjected to changes in temperature pressure?

As temperature increases, the viscosity of water decreases, meaning it flows more easily, while the viscosity of air increases slightly due to lower density at higher temperatures. Conversely, when pressure increases, the viscosity of water remains relatively unchanged, but the viscosity of air increases significantly due to the compression of gas molecules. Overall, temperature has a more pronounced effect on the viscosity of water, while pressure primarily affects air.