True or False: Comparing relative depth of calcinations is a reliable method for indicating fire spread.

The statement is true because comparing the relative depth of calcination on materials can provide insights into the fire's behavior and spread during an incident. Calcination refers to the process where materials, often those containing calcium carbonate, undergo thermal decomposition when exposed to high temperatures.

In fire investigation, assessing the depths of calcination on various materials helps technicians understand how intense the fire was in specific areas, which can indicate the direction and speed of the fire's spread. Greater depths of calcination may suggest prolonged exposure to heat, which can correlate with fire dynamics and the potential for determining the point of origin.

When evaluating fire spread, technicians consider multiple factors such as material types, environmental conditions, and the fire's intensity over time. The relative depth of calcination, compared to other indicators, provides valuable evidence, particularly when cross-referenced with other scenes and materials involved. Thus, it supports the investigation by illustrating how different materials reacted to the fire and the temperature they experienced.