Deck 4: Collection of Crime-Scene Evidence

Question 1

The heat intensity (hotness) of water at 100∘C is ________ the heat intensity of water at 212∘F.

A) less than
B) the same as
C) greater than

Answer 1

B

Question 2

The density of water at 60∘F is ________ the density of water at 28∘F.

A) the same as
B) less than
C) greater than

Answer 2

B

Question 3

The refractive index of a substance varies with:

A) its temperature.
B) the color of the light passing through it.
C) the wavelength of the light passing through it.
D) all of the above
E) none of the above

Answer 3

D

Question 4

Which color of the visible spectrum has the highest frequency and the shortest wavelength?

A) red
B) yellow
C) green
D) violet
E) pink

Question 5

If an object is immersed in a liquid of greater density, it will:

A) float.
B) be suspended in the liquid.
C) sink.

Question 6

Which is NOT an intensive property of matter?

A) refractive index
B) temperature
C) weight
D) density
E) specific heat

Question 7

The freezing point of water in Fahrenheit is ________ the freezing point of water Celsius.

A) greater than
B) the same as
C) less than

Question 8

The weight 264.45 grams can be correctly expressed as:

A) 26.445 centigrams.
B) )26445 kilograms.
C) 26,445 decigrams.
D) all of the above
E) none of the above

Question 9

The basic metric unit for volume is the:

A) milliliter.
B) gram.
C) kilogram.
D) liter.
E) centimeter.

Question 10

The periodic table is a:

A) summary of the order of analyses undertaken in a forensic investigation.
B) chart listing by name and symbol of all the known elements.
C) forensic text table of contents.
D) special laboratory surface for multiphase experiments.
E) forensic newsletter issued periodically.

Question 11

Which physical state has volume but no specific shape?

A) gas
B) liquid
C) solid
D) no such state exists
E) A and B

Question 12

The density of liquids is ________ the density of gases.

A) the same as
B) greater than
C) less than

Question 13

The use of the Celsius temperature scale by scientists is ________ their use of the Fahrenheit temperature scale.

A) greater than
B) less than
C) the same as

Question 14

The effect of gravity on the weight of an object is ________ the effect of gravity on the mass of the same object.

A) less than
B) the same as
C) greater than

Question 15

The process of a glass prism separating sunlight into component colors is called:

A) dispersion.
B) reflection
C) birefringence.
D) refraction.
E) sublimation.

Question 16

Crystalline solids, with the exception of ________ crystals, exhibit ________, or the property of refracting a beam of light into two different ray components.

A) glass, optical properties
B) cubic, double refraction
C) cubic, refraction
D) calcite, refractive index
E) amorphous, refraction

Question 17

The attraction between the molecules of a gas is ________ the attraction between the molecules of a liquid.

A) greater than
B) the same as
C) less than

Question 18

One milliliter of a liquid is ________ 1 cc of the same liquid.

A) greater than
B) less than
C) the same as

Question 19

Eight inches is approximately ________ centimeters.

A) 10
B) 8
C) 17
D) 20
E) 4

Question 20

Sublimation is defined as a change of state from:

A) solid to liquid.
B) liquid to gas.
C) liquid to solid.
D) solid to gas.
E) gas to liquid.

Question 21

The smallest particle of an element that can exist and still retain its identity as that element is the:

A) compound
B) nucleus
C) photon
D) atom
E) element

Question 22

When a bullet penetrates a panel of glass, it leaves a crater-shaped hole that:

A) is wider on the exit side.
B) is wider on the entrance side.
C) forms randomly and hence the direction of impact cannot be determined by its appearance.
D) A or C
E) B or C

Question 23

Stress marks on the edge of a radial crack near the point of impact are:

A) perpendicular to the side on which the force was applied.
B) parallel to the side opposite the side on which the force was applied.
C) perpendicular to the side of the glass facing outdoors.
D) parallel to the side on which the force was applied.
E) none of the above

Question 24

A(n) ___________ property describes the behavior of a substance without reference to any other substance while a(n) ___________ property describes the behavior of a substance when it reacts or combines with another substance.

A) optical; birefringent
B) physical; biological
C) chemical; biological
D) optical; chemical
E) physical; chemical

Question 25

What is the main ingredient in ordinary glass?

A) soda (NaCO)
B) lime (CaO)
C) borate
D) metal oxides
E) sand

Question 26

Which is a true statement about the fracturing of glass?

A) Concentric fractures form first, starting on the side opposite the destructive force.
B) Concentric fractures form first, on the same side as the destructive force.
C) Radial cracks form afterward, starting on the same side as the destructive force.
D) Radial cracks and concentric fractures are formed simultaneously.
E) Radial cracks appear first, starting on the side opposite the destructive force.

Question 27

Pyrex glass:

A) is laminated.
B) has been tempered.
C) is bullet-proof.
D) is put through an annealing process.
E) is made with the addition of boron oxide.

Question 28

A hot-stage microscope and the GRIM 3 are used to determine the ________ of glass fragments.

A) weight
B) refractive index
C) relative density
D) metallic oxide content
E) temperature

Question 29

___________ is the visual effect caused by an object's absorption of certain portions of the visible light spectrum and transmission or reflection others.

A) Refractive Index
B) Density
C) Electricity
D) Color
E) Dispersion

Question 30

If glass cannot be physically pieced together then the control and question glass are best compared as to their:

A) weight and density.
B) refractive index and weight.
C) refractive index and density.
D) color and density.
E) refractive index and color.

Question 31

To explain the events that occur after radiation is absorbed by a substance, light must be characterized as:

A) a wave of variable frequency
B) a stream of discrete particles
C) a wave consisting of non-discrete particles
D) a wave of constant frequency
E) a stream of amorphous particles of varying density

Question 32

The ___________ properties of crystals, such as refractive index and birefringence, provide points of identification that help characterize them.

A) chemical
B) optical
C) amorphous
D) physical
E) electromagnetic

Question 33

The two most important physical properties of glass for forensic comparisons are:

A) color and density.
B) refractive index and weight.
C) weight and density.
D) refractive index and density.
E) refractive index and color.

Question 34

The change in refractive index upon annealing tempered glass is ________ the change in refractive index upon annealing untempered glass.

A) less than
B) greater than
C) the same as

Question 35

Tempered glass is used in:

A) windshields in autos manufactured in the United States.
B) crystal stemware.
C) the side and rear windows of autos manufactured in the United States.
D) both B and C
E) none of the above

Question 36

The photons of which source have the LEAST amount of energy?

A) microwaves
B) infrared rays
C) gamma rays
D) radio waves
E) visible light waves

Question 37

A piece of glass is immersed in a liquid. It proceeds to float on the liquid's surface. This shows that the density of the glass is ___________ the density of the liquid.

A) not comparable
B) equal to
C) less than
D) more than
E) none of the above

Question 38

In reference to the diagram above, what is the correct sequence of impacts?

A) A first
B) B first
C) A and B simultaneously
D) sequence impossible to determine
E) There are more than two impacts.

Question 39

The refractive index of a medium is determined by the ratio of:

A) velocity of light in a vacuum to frequency of light in a medium
B) frequency of light in a vacuum to frequency of light in a medium
C) angle of refraction to angle of incidence
D) velocity of light in a vacuum to velocity of light in a medium
E) density of light in the medium to density of light in a vacuum

Question 40

Flotation is a method used by scientists to determine the ________ of a particle of glass.

A) refractive index
B) density
C) temperature
D) mass
E) weight

Question 41

Define and explain the difference between the physical and chemical properties of matter.

Question 42

Describe the proper collection of glass evidence.

Question 43

Contract the differences between a solid, a liquid and a gas.

Question 44

Diagram and describe how to examine glass fractures to determine the order of impact of a projectile.

Question 45

Explain the difference between elements and compounds. Cite one example of each.

Question 46

Explain the application of density and refractive index as it pertains to glass evidence.

Question 47

Diagram and describe how to examine glass fractures to determine the direction of impact of a projectile.