Which of the following is NOT a physical characteristic of water?

Density is indeed a physical characteristic of water, as it refers to the mass per unit volume of the water, typically expressed in grams per cubic centimeter (g/cm³). Physical characteristics of water generally concern its observable features like its color, odor, and turbidity.

Color is the visual perception of light transmitted through water and can indicate the presence of materials or substances within it. Odor refers to the smell of the water, which can also signal contamination or the presence of organic matter. Turbidity measures the clarity of the water, usually assessing the level of suspended particles that scatter light.

Understanding these physical properties is critical for water quality assessment in various applications, including water treatment and environmental management. Each characteristic plays a significant role in evaluating the safety and usability of water supplies.