Forensics Unit 2
Terms
undefined, object
copy deck
- refraction
- The bending of light waves because of a change in velocity.
- intensive property
- Any characteristic of a substance that remains the same regardless of sample size.
- sink
- In this case, the glass fragment has a higher density than the liquid it is immersed in.
- radial fractures
- Cracks in glass which radiate outward.
- electromagnetic spectrum
- The entire range of radiation energy from the most energetic cosmic rays to the least energetic radio waves.
- homogeneous
- A substance with a uniform structure or composition throughout.
- density
- Mass per unit volume.
- liquid
- A phase of matter that may vary in shape but has a definite volume
- amorphous solids
- Substances that have their atoms arranged randomly.
- liter
- The base metric unit of volume.
- solution
- A mixture in which one substance is dissolved into another.
- heterogeneous
- A substance that does not have a uniform consistency or is made of dissimilar components.
- phase
- The physical state of matter.
- meter
- The base metric unit of length.
- concentric fractures
- Cracks in glass which encircle the hole.
- flloat
- In this case, the glass fragment has a lower density than the liquid it is immersed in.
- mixture
- A substance consisting of two or more components in varying proportions that retain their own properties.
- glass
- A hard, brittle, amorphous substance that is composed of silicon oxides mixed with various metal oxides.
- Celsius
- A metric unit for temperature.
- suspension
- A substance in which the particles are mixed together but not dissolved.
- suspended
- In this case, the glass fragment has the same density than the liquid it is immersed in.
- flotation method
- A precise & rapid procedure for comparing glass densities.
- gas
- A phase of matter that has no definite shape or volume.
- colloid
- A mixture containing tiny particles distributed homogeneously throughout.
- compound
- A group of atoms of 2 or more elements.
- temperature
- A measure of heat intensity.
- Becke line
- A bright halo near the border of a particle that is immersed in a liquid of a different refractive index.
- viscosity
- A resistance to flow in a liquid.
- gram
- The base metric unit of mass.
- chemical property
- This describes the behavior of a substance when it reacts or combines with another substance.
- wavelength
- The distance between two successive crests of a wave.
- refractive index
- The ratio of the velocity of light in a vacuum to that in the medium under examination.
- metric
- Scientists throughout the world use this system of measurement.
- weight
- The force with which gravity attracts a body.
- tempered
- Glass made stronger than normal glass through a process of rapid heating and cooling.
- laminated
- Glass found in car windshields has a layer of plastic between two pieces of ordinary window glass.
- atom
- The basic particle of an element.
- double refraction
- Occurs when solids bend a beam of light in two different light-ray components.
- crystalline solids
- Substances that have definite geometric forms because of the orderly arrangement of their atoms.
- solid
- A phase of matter with a definite shape and volume.
- sublimation
- Conversion of a substance from a solid to a vapor without going through a liquid phase.
- molecule
- Any two or more atoms bound together.
- element
- The simplest substances known that provide the building blocks from which all matter is composed.
- 3R Rule
- Radial cracks form a right angle on the reverse side of the force.
- evaporation
- Occurs when a substance changes from a liquid to a gas.
- amorphous solids
- Substances that have their atoms arranged randomly.
- birefringence
- The numerical difference between the two refractive indices produced by a double refraction.
- mass
- Refers to the amount of matter an object contains independent of gravity.
- medium
- A surrounding or enveloping substance.
- match point
- The point at which the Becke line disappears and minimum contrast between liquid and particle is observed.
- frequency
- The number of wave crests passing any one given point per unit of time.
- photons
- Discrete particles of light.
- velocity
- The rate of change of position of an object along a straight line with respect to time.