Forensic Science Exam

Hair, Paint, Fiber NAME

  1. Hair is an appendage of the skin that grows out of an organ called the ______.
  2. The layer underneath the cortex is the ______.
  3. The ______is a cellular column running through the shaft of the hair.
  4. The three types of medulla are ______, ______, and ______.
  5. Most human head hair has______medulla.

  1. The first phase of hair growth is ______which may last up to ______years.
  1. The second phase of hair growth is ______.
  2. The final phase of hair growth is ______.
  1. Hair grows at an average rate of ______cm per month.
  1. In ______races pigment is usually dense and unevenly distributed. In ______race pigment is usually coarse and evenly distributed.
  1. When determining if a hair was forcibly removed a scientist would look for a ______.
  1. The most common plant fiber found is ______.
  1. Three examples of synthetic fibers are ______, ______, and ______.
  1. The ______is the basis chemical substance found in most synthetic fibers.
  1. Paint is composed of ______(to give color and hiding quality) and a ______which provides the support medium for the pigment and other additives.
  1. The ______is the first coat of automotive paint.
  1. The second layer of automotive paint is the ______.
  2. The last layer of automotive paint is the ______.
  1. Give an example of when paint recovered from a crime scene can be said the have individual characteristics and another example of when it can be said to have class characteristics.(On back)
  1. How many hairs does a typical person shed each day?
  2. 50 b. 100c. 25
  1. What were the 2 things constant in Roger Kibbes (The I-5 Strangler) murder victims? ______
  2. How did Roger Severs (the case that happened in England) kill his parents? ______
  1. How did investigators locate the bodies of Roger Severs parents? ______
  1. What is the last phase in analysis of a fiber?
  2. Determining if they are identical
  3. Microscopic comparison
  4. Analyze the dye
  1. In humans the medulla index is ______.
  2. 1/2 b. 2/3c. 1/3
  1. Starting in ____ the Law Enforcement Standards Laboratory has collected and given out to crimelabs auto paint samples from domestic cars.
  2. 1974b. 1985c. 1991
  1. True or False, new garment tend to shed more fibers than older ones.
  2. The compound microscopeconsists of a ______system and an ______system.
  1. What are the five components of the mechanical system of a compound microscope?
  2. ______
  3. ______
  4. ______
  5. ______
  6. ______
  1. For transparent objects the light source is placed underneath. This is called ______illumination.
  1. When objects are not transparent the light must be placed above the object. This is ______illumination.
  1. The ______collects light rays from the base illuminator and concentrates them on the object.
  1. If the object stays in focus when switching objectives the microscope is said to be ______.
  1. The ability of an objective lens to resolve details into 2 clear images instead of one blurry one is directly proportional to the ______value of the objective lens.
  1. The higher the magnification the ______the field of view.
  1. The ______is the most commonly used and most versatile microscope used in forensic lab.
  1. Light can be passed through a ______which only allows light in one plane to pass through.
  1. The ______microscopes are used to identify minerals and synthetic fibers.
  1. In an electron microscope a beam of electrons is emitted from a tungsten filament and focused onto the specimen using electromagnets. This is called the ______beam.
  1. In an electron microscope ______% of the electrons that hit the specimen bounce off. These are called ______electrons.
  1. The advantages of an SEM is the high level of magnification of up to ______times.

From the videos

  1. How did investigators determine what kind of automobile was involved in the hit and run of Kirk Hudson? ______
  2. How was the driver of the van identified? ______
  3. What two pieces of evidence were used to link the van to the crime scene? ______
  4. How much was the ransom amount for Charles Linburgh’s baby? ______
  5. How was Bruno Hauptmann put to death? ______
  6. What two pieces of evidence connected the furniture repairman to Nancy Titterton? ______
  7. What evidence was found on Roger Panes suit, even after it had been cleaned, that connected him to Clair Josephs? ______
  8. What caused the abrasion on Donald Catching’s arm? (He murdered Belinda Wood and set fire to the apartment building) ______
  9. How was the body of Michael Wallace found fifteen years after her disappearance? ______
  10. How was Michael’s skeleton positively identified? ______