Chromatography
What type of evidence is chromatography
what is physical evidence
Is cotton fabric plant based or artificial?
plant based
How many differant kinds of fingerprints are there (not including composite)?)
3
What does natural mean?
Taken entirely from plants or animal sources.
If the tracks are deep in the toe the suspect was
Running
Which molecules travel farther up the paper
what is lighter molecules
What smell would a plant-based fibre have if it burnt?
Burning paper
What is a Bifurcation?
A bifurcation is when a ridge splits in to two ridges.
What does sinew come from?
Animal tendon, stretchy, cord, accesories.
Animals like ducks will have what kind of tracks
Webbed
what is chromatography?
What is a lab technique used to separate mixures
What does it show if there are lots of fibres found at a crime scene?
There was lots of body contact, possibly a fight
How many deltas does a Arch have?
0
What hapens when there is a great nuber of fiber?
That means there has been more contact during the scene.
Do Cats have bumpy pads or concave pads on the heels of their tracks?
what is the reason we pens have colour
What is pigment
Which type of fabric dissolves in a strong base?
Wool
What is a latent Fingerprint?
A fingerprint that has been placed on a surface
What does it mean when the fiber is dissolved in strong acid?
It means it could either be from plant, silk, or manufactured.
If there is spray in front of the tracks the suspect is
Running
Why can we differentiate between brands
What is the fact that all brands have different chemical formulas for different colors than other brands
Which type of evidence is fibre considered?
Class evidence
Name 9 differant features used to identify fingerprints.
Posible answers: Delta, whorl, arch, loop, bifurcation, ridge ending, lake, island, spur, dot. (any 9 of the posible answers is correct)
What are the two main types of man made fibres?
Artificial and Synthetic.
What things do you look for when analyzing a human print?
Size, tread, type, weight, height, speed, direction