Hairs
Hair is an appendage of the skin that grows out of this organ.
What is the follicle?
Fibers can be natural or this, meaning not from plant or animal material.
What is manufactured or synthetic?
These three things are needed to start a fire.
What are fuel, oxygen and heat?
Explosives are classified into these two catagories.
What are low and high?
This writing is often collected from the suspect for comparison purposes.
What is an exemplar?
The hair shaft is composed of these three layers.
What are the cuticle, the cortex and the medulla?
This is the most prevalent plant fiber.
What is cotton?
A fire that is started by a natural heat-producing process is said to do this.
What is spontaneously combust?
This area of an explosion crime scene should always be searched first for evidence.
What is the crater?
This technique is used for comparing different inks.
What is TLC or thin-layer chromatography?
This is the best packaging for hair, both exemplars and evidential.
What is folder paper and an envelope?
Synthetic fibers are often made of these substances, repeating units of arranged atoms.
What are polymers?
This is the main focus of the search of the fire scene.
Based on their sensitivity to hear, shock or friction, high explosives are classified into these two groups.
What is primary and secondary?
These are impressions left on papers positioned under a piece of paper that has been written on.
What are indented writings?
This DNA rich piece may be found on hair forcibly removed from someone's head.
What is a follicular tag?
This technique can be used to determine if two fibers are dyed the same color.
What is TLC or thin layer chromatography?
These containers should be used for all fire debris evidence.
What are metal cans?
This is the most popular and powerful military explosive.
What is RDX?
Photography with this type of film may be used to distinguish writing with inks of different chemical compositions.
What is infrared film?
This layer of the hair shaft is used for determining if a hair is human or not.
What is the cuticle?
Not having individual characteristics, fibers are considered having these because of the mass production of our clothing these days.
What are class characteristics?
This is the most sensitive instrument for detecting and characterizing flammable residues found at an arson scene.
What is a gas chromatograph?
These four legged animals are often trained to sniff out explosive residue at airports or buildings.
What are explosive detection dogs? :)
A property that some inks have where they emit infrared light when exposed to blue-green light.
What is infrared luminescence?