Forensic Chap. 9
Solids that have their atoms randomly arranged are said to be [blank].
amorphous solid
A(n) [blank] is the smallest particle of an element that can exist.
atom
When glass is immersed in a liquid of similar refractive index, its [blank] disappears and minimum contrast between the glass and liquid is observed.
becke line
The crystal calcite has two indices of refraction. The difference between these two values is known as [blank].
birefringence
A centigram is equivalent to [blank] gram(s).
1/100 or 0.01
A milliliter is equivalent to [blank] liter(s).
1/1000 or 0.001
There are [blank] degrees Celsius between the freezing and boiling points of water.
100
The number of elements known today is [blank].
118
There are [blank] degrees Fahrenheit between the freezing and boiling points of water.
180
0.2 gram is equivalent to [blank] milligram(s).
200
The equivalent of 1 pound in grams is [blank].
453.6
A(n) [blank] property describes the behavior of a substance when it reacts or combines with another substance.
chemical
Substances composed of two or more elements are called [blank].
compound
Glass fracture lines that encircle the hole in the glass are known as [blank] fractures.
concentric
Mass per unit volume defines the property of [blank].
density
The two most useful physical properties of glass for forensic comparisons are [blank] and [blank].
density, refractive index
The process of separating light into its component colors o frequencies is known as [blank].
dispersion
Light, X-rays, and radio waves are all members of the [blank] spectrum.
electromagnetic spectrum
The basic building blocks of all substances are the [blank].
elements
The simplest type of balance for weighing is the [blank].
equal-arm balance
True or False: A liter is slightly larger than a quart.
false
True or False: Frequency and wavelength are directly proportional to one another.
false
True or False: It is easy to determine from the size and shape of a hole in glass whether it was made by a bullet or some other projectile.
false
True or False: Stress marks on the edge of a radial crack are always perpendicular to the edge of the surface on which the impact force originated.
false
If an object is immersed in a liquid of greater density, it will (sink, float).
float
Comparing the relative densities of glass fragments is readily accomplished by a method known as [blank].
flotation
The exact numerical density and refractive indexes of glass can be correlated to [blank] in order to assess the evidential value of the comparison.
frequency of occurance
A hard, brittle, amorphous substance composed mainly of silicon oxides is [blank].
glass
A gas (has, has no) definite shape or volume.
has no
Glass that can be physically pieced together has [blank] characteristics.
individual
[blank] glass gains added strength from a layer of plastic inserted between two pieces of ordinary window glass; it is used in automobile windshields.
laminated
A beam of light that has all of its waves pulsating in unison is called a(n) [blank].
laser
Red light is (more, less) energetic than violet light.
less
The attraction forces between the molecules of a liquid are (greater, less) than those in a solid.
less
One cubic centimeter (cc) is equivalent to one [blank].
liter
Red light is (higher, lower) in frequency than violet light.
lower
The amount of matter an object contains determines its [blank].
mass
Anything that has mass and occupies space is defines as [blank].
matter
The basic units of measurement for length, mass, and volume in the metric system are the [blank], [blank], and [blank], respectively.
meter, gram, liter
The [blank] system of measurement was devised by the French Academy of Science in 1791.
metric
A(n) [blank] is the smallest unit of a compound formed by the union of two or more atoms.
molecule
A crater-shaped hole in glass is (narrower, wider) on the side where the projectile entered the glass.
narrower
When glass's elastic limit is exceeded, the first fractures develop into radial lines on the surface of the (same, opposite) side to that of the penetrating force.
opposite
Glass-containing shoes and/or clothing should be individually wrapped in [blank] and transmitted to the laboratory.
paper
An arrangement of elements by similar chemical properties is accomplished in the [blank] table.
periodic
Different [blank] are separated by definite visible boundaries.
phases
One model of light depicts it as consisting of energy particles known as [blank].
photons
A(n) [blank] property describes the behavior of a substance without reference to any other substance.
physical
The fracture lines radiating outward from a crack in glass are known as [blank] fractures.
radial
The bending of a light wave because of a change in velocity is called [blank].
refraction
The physical property of [bank] is determined by the ratio of the velocity of light in a vacuum to light's velocity in a substance.
refractive index
Collected glass fragment evidence should be packaged in [blank] containers to avoid further breakage.
solid
The physical state that retains a definite shape and volume is a(n) [blank].
solid
During the process of [blank], solids go directly to the gaseous state, bypassing the liquid state.
sublimation
[Blank] is a measure of a substance's heat intensity.
temperature
[blank] glass fragments into small squares, or "dices," with little splintering when broken.
tempered
True or False: Automobile headlights and heat-resistant glass, such as Pyrex, are manufactured with lime oxide added to the oxide mix.
true
True or False: Color is a usual indication that substances selectively absorb light.
true
True or False: One meter is slightly longer than a yard.
true
True or False: Solids having an orderly arrangement of their constituent atoms are crystalline.
true
True or False: The energy of a light particle (photon) is directly proportional to its frequency.
true
The distance between two successive identical points on a wave is known as [blank].
wavelengths
A fracture line (will, will not) terminate at an existing line fracture.
will
