What is an example of a combustible material?

The selection of newspaper as an example of a combustible material is accurate because combustible materials are defined as substances that can ignite and burn when exposed to a sufficient heat source. Newspaper is primarily made of paper, which is derived from wood pulp and has a relatively low ignition temperature, making it easy to catch fire and burn.

In contrast, metals and concrete are not considered combustible materials. Metals typically require extremely high temperatures to ignite, and while they can melt, they do not burn in the same way combustible materials do. Concrete, being a composite of cement, sand, and gravel, is generally non-combustible and does not ignite or support combustion under normal circumstances.

Plastic, while it can burn and is classified as a flammable material, varies widely in its ignition properties depending on its chemical composition. However, it is not as easily ignited as newspaper, which is specifically designed to be lightweight and absorbent, properties that facilitate combustion.

In summary, newspaper is a clear example of a combustible material because it ignites and burns readily, demonstrating the characteristics that define combustibility.