Question 1

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

Accepted Answer

Stress marks on the edge of a radial crack near the point of impact are parallel to the side on which the force was applied. This is because the fracture originates from the point of impact and propagates outward in a radial pattern, causing stress marks to be perpendicular to the crack itself.

Question 2

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

Accepted Answer

Refractive index is defined as the ratio of the velocity of light in a vacuum to the velocity of light in a medium.

Question 3

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

Accepted Answer

The comparison between the control and question glass revolves around their optical properties. Refractive index is a measure of how much a material bends light, and it is a characteristic property of glass that uniquely identifies it. Density and weight are not relevant to this comparison, and color is not mentioned in the context of the question. Therefore, C is the best choice, as it compares the important optical property of refractive index for both samples.

Question 4

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

Accepted Answer

Refractive index is the measurement of the amount of bending or refraction that occurs as light passes through a substance. Glass has a unique refractive index that can be used to distinguish between different types of glass. Density is also an important property as it can help determine if two pieces of glass come from the same source or if they have been tempered or laminated, which can affect their density. Therefore, the two most important physical properties of glass for forensic comparisons are refractive index and density.

Question 5

Pyrex glass:

Accepted Answer

The answer of Pyrex glass:
...

Question 6

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.

Accepted Answer

Physical properties describe the behavior of a substance without reference to any other substance, while chemical properties describe the behavior of a substance when it reacts or combines with another substance. The other choices do not accurately describe the difference between these two types of properties.

Question 7

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.

Accepted Answer

The glass is floating, which means the buoyant force acting on the glass must be equal to or greater than its weight. This can only happen if the density of the glass is less than the density of the liquid it is in, as objects float if they are less dense than the liquid they are in. Therefore, the correct answer is B, less than.

Question 8

What is the main ingredient in ordinary glass?

Accepted Answer

The main ingredient in ordinary glass is sand, specifically silicon dioxide (SiO2). While lime and soda may be added in the manufacturing process, they are not the main ingredient. Metal oxides may also be present in some types of glass, but they are not the defining ingredient of ordinary glass.

Question 9

Tempered glass is used in:

Accepted Answer

Tempered glass is used in the side and rear windows of autos manufactured in the United States. While laminated glass is used in the windshields of autos. It is not used in crystal stemware. Therefore, option C is the correct choice.

Question 10

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

Accepted Answer

To explain the events that occur after radiation is absorbed by a substance, such as the photoelectric effect or the specific quantized energy levels of electrons in atoms, light is best characterized as a stream of discrete particles, known as photons. This particle model of light complements the wave model, addressing phenomena that the wave model cannot fully explain.

Question 11

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

Accepted Answer

The process of a glass prism separating sunlight into component colors is known as dispersion.

Question 12

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

Accepted Answer

When a bullet penetrates glass, it creates a crater-shaped hole that is wider on the exit side due to the force of the bullet pushing glass fragments outward as it exits.

Question 13

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

Accepted Answer

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

Question 14

The fracture pattern of glass usually has:

Accepted Answer

Glass fractures typically have both radial and concentric lines, also known as conchoidal fractures, which are a characteristic of brittle materials. The radial lines form from the point of impact, while the concentric lines are created as the force of the impact spreads out.

Question 15

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

Accepted Answer

Flotation is a method that involves suspending a particle in a liquid and determining the density of the liquid at which the particle neither sinks nor floats. Therefore, this method is used to determine the density of the particle.

Question 16

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

Accepted Answer

A hot-stage microscope or the GRIM 3 is used to determine the refractive index of glass fragments. This can help in identifying the type of glass and potentially linking it to a source.

Question 17

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

Accepted Answer

Cubic crystals exhibit double refraction, which is the property of splitting a beam of light into two rays with different refractive indices. Amorphous solids (A) do not have a regular arrangement of atoms or molecules, so they do not exhibit any systematic optical properties. Calcite (B) is a mineral that exhibits double refraction, but it is not the only crystal to do so. Glass (C) is not a crystal, and while it does have optical properties, it does not exhibit double refraction.

Question 18

The change in refractive index for tempered glass upon annealing is ________ when compared to non-tempered glass.

Accepted Answer

The change in refractive index for tempered glass upon annealing is greater than for non-tempered glass because the tempering process introduces stresses that alter the glass structure, and annealing relieves these stresses, causing a more significant change in the refractive index.

Question 19

Which is a true statement about the fracturing of glass?

Accepted Answer

Radial cracks appear first and start on the side opposite the destructive force due to the tensile stress exceeding the strength of the glass.

Question 20

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

Accepted Answer

The smallest particle of an element that can exist and still retain its identity as that element is the atom. Compounds are made up of multiple elements and therefore cannot be the smallest particle of an element. Photons are particles of electromagnetic radiation and do not possess mass or identity as an element.

Quiz 10: Matter, light, and Glass Examination

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

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

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

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

Pyrex glass:

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 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.

What is the main ingredient in ordinary glass?

Tempered glass is used in:

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

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

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

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

The fracture pattern of glass usually has:

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

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

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

The change in refractive index for tempered glass upon annealing is ________ when compared to non-tempered glass.

Which is a true statement about the fracturing of glass?

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

Quiz 10: Matter, light, and Glass Examination

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

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

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

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

Pyrex glass:

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 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.

What is the main ingredient in ordinary glass?

Tempered glass is used in:

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

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

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

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

The fracture pattern of glass usually has:

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

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

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

The change in refractive index for tempered glass upon annealing is ________ when compared to non-tempered glass.

Which is a true statement about the fracturing of glass?

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

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.

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