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What does viscosity refer to?

A liquid's rate of evaporation

A liquid's resistance to flowing

Viscosity refers to a liquid's resistance to flowing, which is a crucial aspect in understanding how liquids move under various conditions. It describes how thick or thin a liquid is; for example, maple syrup has a higher viscosity than water, meaning it flows more slowly. This property is significant in various applications, including chemical processing and HAZMAT response situations, where the behavior of liquids can affect containment and cleanup strategies.

The other choices touch on different properties of liquids but do not accurately define viscosity. While a liquid's rate of evaporation relates to its volatility, and density compares the mass of a liquid to solids, these concepts do not capture the essence of how viscosity specifically describes flow characteristics. Similarly, a liquid's purity level pertains more to the composition and cleanliness of the substance rather than its physical property of flow resistance.

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A liquid's density compared to solids

A liquid's purity level

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