Viscous materials are substances that resist flow and deformation when a force is applied. They have a thick, sticky consistency, which means they do not easily change shape. Common examples include honey, molasses, and motor oil. The viscosity of a material is a measure of its resistance to flow, with higher viscosity indicating a thicker substance. The behavior of viscous materials is important in various industries, including food production, cosmetics, and manufacturing. Understanding viscosity helps in processes like mixing, pouring, and applying these materials. Engineers and scientists often use viscosity measurements to ensure product quality and performance.