MIDTERM (Starts On Hair)

74問 • 11ヶ月前

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a specialized optical instrument used to examine and analyze the microstructure of opaque materials, particularly metals and alloys, by reflecting light off their polished surfaces.

METALLOGRAPHIC MICROSCOPE

An appendage of the skin which occurs everywhere on the human body

HAIR

Hairs occurs everywhere on the human body except on the ___________ and _____________.

PALM OF THE HAND AND SOLE OF FEET

Two kinds of hair

REAL HAIR AND FUZZ HAIR

Generally long and stiff

REAL HAIR

generally short, fine at times curly and wooly

FUZZ HAIR

Parts of the hair

ROOT, SHAFT, AND TIP

A part of hair portion embedded in the skin

ROOT

portion above the surface of the skin. Most distinctive part of the skin.

SHAFT

sometimes termed as point. The distal end of an uncut hair shaft.

TIP

Parts of the shaft

CUTICLE, CORTEX, AND MEDULLA OR CORE

Air network in fine grains.

HUMAN HAIR

Cells invisible without treatment in water

HUMAN HAIR

Value of medullary index is lower than 0.5

HUMAN HAIR

Air network in form of large or small sacks

ANIMAL HAIR

Value of medullary index is higher than 0.5

ANIMAL HAIR

A number of fibers are derived from ______ product, the most important being wool, silk, camel’s hair and fur.

ANIMAL FIBERS

This class includes most of the inexpensive clothing fibers, like cotton, linen, jute, hemp, ramie and sisal.

VEGETABLE FIBER

First provide useful fibers like glass wool and asbestos which is used for safe insulation, while the latter is applied chemistry which produced a number of fibers like rayon, nylon, orlon and Dacron.

MINERAL AND SYNTHETIC FIBERS

What is the mineral that is used for safe insulation, while the latter is applied chemistry which produced a number of fibers like rayon, nylon, orlon and Dacron.

ASBESTOS

is best described as a supercooled liquid which possesses high viscosity and, hence, rigidity

GLASS

Glass is usually composed of oxides such as ____, _____ _____ and ________ ________.

SILICA, BORIC OXIDE, AND PHOSPOROUS PENTOXIDE

Types of Glass Fractures

RADIAL FRACTURE AND CONCENTRIC FRACTURE

primary fracture resembles the spokes of a wheel radiating outward from the point of impact.

RADIAL FRACTURE

secondary fracture having the appearance of circles around the point of impact connecting one radiating crack to the other, thus forming triangular pieces of glass.

CONCENTRIC FRACTURE

The radial fracture of the first bullet hole will ________ the radial fractures of the succeeding bullet holes.

END/STOP

is one method for instance in determining if glass fragments found on a suspect’s clothing came from a window at the scene of a burglary

COMPARING FRACTURE PATTERN

are present, but not readily visible in drawn glass samples. These ream marks resemble tool marks striations.

REAM MARKS

a strong mark produced by pressure that goes below the surface. A stamp, form or figure resulting from physical contact. It causes damage to object.

IMPRESSION

weak mark made by pressure that stays on the surface.

IMPRINT

a faithful reproducing of an impression with the use of casting materials.

MOULAGE

moulage ________ ________ all characteristics of an object under all circumstances but whatever is missing in a moulage it can be supplied by the photograph

CANNOT PRODUCE

any material which can be changed from a plastic or liquid state to the solid condition.

CASTING CLAY

The commonly used casting material in the Philippines

PLASTER OF PARIS

the art of extracting and working in metals by the application of chemical and physical knowledge.

METALLURGY

the branch of metallurgy which involves the study of the microstructures of metals and alloys.

METALLOGRAPHY

What is the crime committed where entrance is by breaking doors with the use of metallic tools.

ROBBERY

Application of Metallurgy in Criminal Investigation

HIT AND RUN CASES, BOMB AND EXPLOSION, NAIL EXAMINATION, COUNTERFEIT COINS, RESTORATION OF SERIAL NUMBERS

are coins made to imitate the real thing and used for gain.

COUNTERFEIT COINS

coins made in molds

CASTING COINS

coins made by stamping or striking method. Are coins made to imitate the real thing and used for gain.

STRUCK COINS

will help in visualizing the serial number

POLISHING THE SURFACE

This acid reacts with the metal and produces hydrogen gas bubbles

ACID ETCHING

is that branch of geology which deals with the systematic classification and identification of rocks, rock forming minerals, and soils.

PETROGRAPHY

as evidence has been overlooked by most investigators probably because it is such a common place substance is more or less taken for granted

SOIL

A formed from soil particles that were washed, blown or moved by gravity to the lowlands.

ALLUVIAL SOIL

Formed from the decomposition of igneous, metamorphic and sedimentary rock, the decomposed particles moved by gravity

COLLUVIAL SOIL

Inactive, not migratory soil

SEDENTARY SOIL

Constituents of Soil

IGNEOUS ROCK, METAMORPHIC ROCK, SEDIMENTARY ROCK

A rock that produced by volcanic or intense heat

IGNEOUS ROCK

A rocm had undergone changed in structure, texture through pressure, heat and chemical reaction. Like limestone into marble.

METAMORPHIC ROCK

A Rocks formed by sediments

SEDIMENTARY ROCK

A type of sedimentary rock, formed from cemented sand-sized grains, and is also sometimes referred to as arenite

SANDSTONE

Dust and dirt has been described as ________

A MATTER IN THE WRONG PLACE

Classification of dusts

DUST DEPOSITED FROM THE AIR, ROAD AND FOOTPATH DUST, OCCUPATIONAL DUST, INDUSTRIAL DUST

is the rapid oxidation of substances accompanied by the generations of heat and light.

BURNING AND COMBUSTION

Fire Tetrahydron

FIRE, HEAT, FUEL, CHEMICAL CHAIN REACTION

Any substance that can burn, such as wood, paper, or gas.

FUEL

The energy needed to raise the fuet to its ignition temperature.

HEAT

The oxidizing agent that supports combustion.

OXYGEN

The continuous series of chemical reactions that sustain the fire once it has begun.

CHEMICAL CHAIN REACTION

Propagation of Burning

CONDUCTION, CONVECTION, RADIATION

the transmission of heat thru a medium.

CONDUCTION

a diffusion of heat through a fluid (gas or liquid) by means of the flow of the hotter parts of the fluid to the colder parts.

CONVECTION

the process by which heat is transferred in straight lines from a source to a receiving materials without heating the intervening medium.

RADIATION

Natural Causes of Fire

SUN RAYS, LIGHTNING

focused by bubbles in window panes, shaving mirrors by some other peculiarly shaped glass article which may serve as convex lens.

SUNRAYS

usually strikes a high point of the building and may be traced in path to the ground.

LIGHTNING

indicates burning of humid materials

WHITE SMOKE

accompanied by large flame, indicates petroleum products or rubber

BLACK SMOKE

presence of nitrocellulose sulfur, sulfuric acid, nitric acid, hydrochloric acid.

REDDISH BROWN SMOKE

presence of petroleum

RED FLAME

Presence of alcohol, aldehyde or ketone.

BLUE FLAME

Irritating to nose and cause coughing indicate presence of chlorine

BITING SMOKE

CLJ1 FINALS

Adrian Ramirez · 95問 · 2年前

CLJ1 FINALS