Liquids that evaporate quickly are known as _____ liquids.

Liquids that evaporate quickly are referred to as volatile liquids. This term specifically describes substances that have a high vapor pressure at a given temperature, which means they easily transition from a liquid to a gas through evaporation. Volatile liquids typically have low boiling points, allowing them to evaporate rapidly when exposed to the air. This characteristic is important in various applications, including the formulation of perfumes, solvents, and fuels, where quick evaporation is desirable.

The other terms do not accurately define liquids based on their evaporation rates. Viscous refers to a liquid's resistance to flow; evaporative is a more general term and doesn't specifically denote the rate of evaporation; while transient describes something that lasts for a short time but is not a scientific classification of liquids concerning their evaporation properties. Therefore, "volatile" is the precise term that captures the essence of liquids that vaporize quickly.