The hair, glass and fiber game

The hair shaft is composed of the cuticle, cortex, and root. medulla. crown. granules.

True or false? A projectile hole in glass is always wider at the entry side.

True or false? The cortex may contain pigment granules.

True or false? The shaft of the hair is considered class evidence in a trial.

What’s the word? They start at the point of impact and move outward

What’s the word? the tough outer covering of a hair composed of overlapping scales

What’s the word? Regularly shaped. Particles are arranged in a definite pattern

What’s the word? the actively growing root or base of a hair containing DNA and living cells

True or false? The parallel edge of stress marks in glass always face the surface on which the crack originated.

What’s the word? line created as refracted light is concentrated around the edges of a glass fragment

What are the correct units for measuring density? Milliliters/gram Cubic centimeters/milliliter Grams/milliliter Milliliters/second

What’s the word? the region of a hair located outside the medulla containing granules of pigment

True or false? When glass is hit, it bends and stretches before breaking.

What’s the word? the smallest unit of a textile material that has a length many times greater than its diameter.

Which refractive index would indicate the densest material? 1.4 1.5 1.3 1.2  

What’s the word? a measure of how light bends as it travels from one substance to another

True or false? When a fracture in glass intersects with an existing line of fracture from a previous impact, it will always cross over the existing line.

What’s the word? the central core of a hair fiber

What’s the word? the ratio of a mass of its object to its volume

What’s the word? the change in direction of light as it changes speed in moving from one substance to another

What’s the word? a hard, amorphous, transparent material made by heating a mixture of sand and other additives.

What’s the word? a type of fibrous protein that makes up a majority of the cortex of a hair

What’s the word? A fiber made from man-made substances such as plastic.

What’s the word? Examples include plain, basket, satin and twill

What’s the word? A line drawn perpendicular to a surface

What’s the word? without shape or form. Particles are arranged randomly instead of in a definite pattern.

Which part(s) of a hair can be analyzed for DNA? cortex cuticle follicle medulla

What’s the word? A fiber harvested from animal, plant or mineral sources.

Which factors are used to calculate the medullary index of a hair? length of entire hair and the pattern of pigmentation width of medulla and the width of the hair scale diameter of cuticle and the length of the hair width of cortex and the width of the medulla

A piece of glass from a crime scene has a density of 4 g/mL A piece of glass from a crime scene has a density of 4 g/mL. Which of the following sets of measurements would indicate that another glass fragment could have come from the same source? 1 gram, 4 milliliters 4 grams, 4 milliliters 4 grams, 16 milliliters 8 grams, 2 milliliters

What’s the word? Forms a circle around the point of impact

What’s the word? Fibers that have been spun together

True or false? Hair is composed of a protein called cellulose.

True or false? All hairs on the head of a person are identical.

Which of the following is a synthetic fiber? Silk Nylon Wool Cotton