WorksheetsSCI-255 Exam 2 Review
Total questions: 25
Worksheet time: 13mins
Which type of hair is best for nuclear DNA analysis and therefore is highly valuable evidence?
Shed hair
Cut hair
Hair found on the floor
Pulled hair
If hair is visible and firmly attached to an object, how should the hair be collected?
Pull the hair off with tweezers
Collect the entire object
Pull the hair off with gloved fingers
Cut the hair off of the object
Nuclear DNA can be found in the shaft of hair.
True
False
Which is the ONLY way to conclusively indicate a piece of glass came from a specific source?
Density testing
Fracture matching
Refractive index
There is no test that can be done
How do you collect a soil sample from an impression?
As deep as the impression
Just the top layer of soil
At least 1 inch
From the cast
What is the best way to package paint chips?
In a paper envelope
In a plastic envelope
In a glass vial
Any of these can be used
How should you preserve objects that are suspected to contain accelerants?
Package in a plastic bag
Package in a paper bag
Package in a carboard box
Package in a metal can
When casting a three-dimensional shoe impression:
Leave lumps in the mixture to add texture
Do not pour the casting mixture directly onto the impression
Casting should be done before photography
If the cast isn't successful, repeat a second time
When examining footwear impressions, the analyst will look at the known first.
True
False
It's okay to remove debris that is imbedded in the impression prior to casting.
True
False
Which lifting technique is best for a dusty tire print on a smooth surface?
Tape lift
Gel lifter
Electrostatic dust lifter
All of the above are acceptable choices
What should be done to a tool mark prior to casting the impression?
Look for trace evidence in the impression
Search for a tool at the scene that could have made the mark
See if a tool will fit into the mark
Remove all visible debris
An individual with a flattened cross-section for their hair would have what type of hair?
Straight
Wavy
Curly
Which stage is the transitional phase in the hair growth cycle?
Anagen
Catagen
Telogen
How should a suspect tool be packaged?
In a tight envelope that limits movement
Wrapped in paper to protect the working end
In a metal paint can
All of the above are acceptable packaging techniques
On a vehicle, the track width refers to which set of measurements?
The distance between the two front tires
The distance between the front and rear tires
The distance between the two rear tires
A stamped impression is another term for:
Drag impressions
Striated impressions
Cast impressions
Indented impressions
When pouring casting material into an impression, it should be poured onto:
A baffle
The middle of the impression
A waffle
A blow-up sketch would NOT be necessary for:
Bullet trajectories
Areas with a few items of evidence
Large bloodstain pattens
Areas with a lot of evidence
The type of sketch that is created to scale back at the lab is:
Rough sketch
Final sketch
Which type of sketch is best to show changes in the terrain at a crime scene?
Blow-up
Elevation
Birds-eye view
Exploded view
When sketching the crime scene, you chose to use two corners of a wall as your fixed points. Which evidence fixing method is this?
Rectangular coordinates
Transecting baseline
Triangulation
Polar coordinates
When mapping an indoor crime scene, what is first measured?
Measure the perimeter
Measure walls and objects within the scene
Fix evidence
Measure furniture
What is the purpose of a layout sketch?
Show individual items of evidence within the scene
Shows one room within the scene
Shows the spatial relationship of the scene
Shows the neighborhood around the scene
A vehicle has damage on two different areas. How many paint samples (evidence and standard) do you need to collect?
1
2
3
4
