Which is a dispersion pattern created by the release of a hazardous material?

A cloud is a dispersion pattern that occurs when a hazardous material is released into the atmosphere. This pattern typically forms due to the buoyancy of the released substance, which can rise and spread out in the air depending on various factors such as wind speed, temperature, and the physical properties of the material itself.

When a hazardous material is released, it often disperses into the air forming a visible plume or cloud that can travel over a significant distance from the source of the release. This is critical for first responders to understand, as it helps in assessing the impact area and taking necessary actions for containment and public safety.

In contrast, a river, V pattern, or puddle refer to different scenarios or substances. A river suggests a flowing liquid context, which does not represent the airborne dispersal of a gas or vapor. A V pattern typically describes the spread of a gas in a specific direction due to wind but is not as universally applicable or recognizable as the term cloud. A puddle indicates a localized pooling of liquid on a surface, which does not align with the concept of airborne dispersion. Thus, recognizing a cloud as the primary dispersion pattern for hazardous materials is essential for effective response and management.