Mod 1 DBA Review v23

Locards Exchange Principle

• Every contact leaves a stain
• Every contact leaves a trace
• Every contact leaves a residue
• Every contact leaves a mark

Blood types are shared by many people, making blood a type of (a)   that leads to a group of possible matches.

• class evidence
• individual evidence
• biologocal evidence

Reorder the following steps to process a crime scene ( All 7 are NOT included here)

• collecting and packaging evidence

• Sketches

• Maintain a chain of custody and evidence log

• Preserve and isolate the crime scene

• search the scene for evidence

Match the following to the correct property

• decomposition

• chemical property

• physical property

• toxicity

• shape

• Chemical property - how acidic or basic it is

• chemical property

• physical property

• pH

• color

Locards exchange principle implies

• a hair of fiber can be transferred from one surface to another

• DNA can be used to identify a suspect

• paint transferred between cars in an accident is indivudal evidence

• DNA can be found in animal hair

If a scientist tests for how much heat is given off by a substance, then they are testing the _____ of the substance.

• physical properties

• class properties

• chemical properties

• heat retention

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Match the following handwriting traits

• size of the letters

• letter size

• loops and swirls

• n-gram tracing

• where the person writes on the page

• Line habits

• sequence of syllables, letters or words

• embellishments of handwriting

A forensic analyst performs ink chromatography on a sample of writing on paper. ​ The colors travel the following distances: Yellow: 50nm Blue: 250nm Purple: 300nm Which is the correct order for the ink colors on the test paper? (a)   ​

• Yellow, blue, purple
• Blue, purple, yellow
• Purple, blue, yellow

Match the methods of art analysis

• underdrawings

• light microscope

• craquelure

• mass spectrometry

• chemical makeup of paint

• x-ray

Match the following

• digital evidence

• a map drawn by a suspect

• perception

• They looked high

• inference

• it smelled like cigaratte smoke

• recover computer files

• Disk Drill

• demonstrative evidence

• Search history of a cell phone