Forensics (Fibers, Textiles, Hairs)

What is the importance of fiber evidence in forensic science?

• Fiber evidence can link a suspect to a crime scene or victim.

• Fiber evidence is used to determine the time of death.

• Fiber evidence can identify the type of weapon used in a crime.

• Fiber evidence is irrelevant in modern forensic investigations.

Give an example of a natural fiber.

• Cotton

• Nylon

• Polyester

• Acrylic

What is the role of the cortex in hair structure?

• The cortex provides strength, color, and texture to the hair.

• The cortex acts as a protective layer against environmental damage.

• The cortex is responsible for hair growth and regeneration.

• The cortex determines the hair's moisture content.

What is the primary difference between natural and synthetic fibers?

• Natural fibers are derived from natural sources, while synthetic fibers are man-made.

• Natural fibers are more durable than synthetic fibers.

• Synthetic fibers are always more expensive than natural fibers.

• Natural fibers are used exclusively in clothing.

Is rayon a common type of regenerated fiber?

• True, rayon is derived from cellulose and is mostly plant in origin.

• False, rayon is a synthetic fiber made from petroleum.

• True, rayon is a type of plastic fiber.

• False, rayon is derived from animal proteins.

What is a polymer?

• A small molecule that cannot be broken down further.

• A large molecule made up of repeating structural units, often used in synthetic fibers.

• A type of metal used in construction.

• A natural substance found in living organisms.

What is the deepest layer of hair called?

• Cortex

• Cuticle

• Medulla

• Follicle

How are fibers classified?

• Fibers are classified as either natural fibers or synthetic fibers.

• Fibers are classified based on their color and texture.

• Fibers are classified according to their length and thickness.

• Fibers are classified into organic and inorganic categories.

What are natural fibers derived from?

• Only from plants.

• Only from animals.

• Natural fibers come from animals, plants, and minerals.

• Only from synthetic materials.

What is the significance of hair in forensic investigations?

• Hair can be easily decomposed, making it unreliable for solving old crimes.

• Hair does not easily decompose, making it useful for solving old crimes.

• Hair color can change over time, affecting its forensic value.

• Hair is not used in forensic investigations at all.