What term describes a mixture of solid particles dispersed in a liquid that requires agitation?

The term that describes a mixture of solid particles dispersed in a liquid that requires agitation is "suspension." In a suspension, solid particles do not dissolve but are instead distributed throughout the liquid. Over time, these particles can settle to the bottom if left undisturbed, which is why agitation or mixing is necessary prior to use. This characteristic is crucial when dealing with pesticides, as proper mixing ensures even application and effectiveness of the active ingredients.

In contrast, a solution is a homogeneous mixture where the solute completely dissolves in the solvent, and no agitation is required to maintain the mixture. An emulsion refers to a mixture of two immiscible liquids, typically oil and water, where one liquid is dispersed within the other. Suction does not pertain to mixtures; it generally refers to a force that draws substances into a space. Understanding these distinctions is essential in the context of pesticide application and proper formulation handling.