Exploring Trace Evidence

Who introduced the concept of trace evidence?

• Isaac Newton

• Marie Curie

• Albert Einstein

• Professor Edmond Locard

What is the first step in gathering trace evidence from clothing?

• Chemical analysis

• Visual inspection

• Washing the item

• Scanning with a microscope

What can be an example of trace evidence?

• A single hair

• A sound recording

• A piece of paper

• A digital file

What type of material can be analyzed in trace evidence?

• Neither synthetic nor natural materials

• Only synthetic materials

• Only natural materials

• Both synthetic and natural materials

What is gunshot primer residue testing associated with?

• Explosive residue analysis

• Wood and plant material examination

• Firearm discharge examination

• Paint analysis

Which microscope can magnify items up to 300,000 times their normal size?

• Polarizing microscope

• Phase-contrast microscope

• Fluorescence microscope

• Scanning electron microscope

What does a comparison microscope do?

• Compares known samples with evidence side-by-side

• Magnifies items up to 300,000 times

• Identifies chemical ions in debris

• Detects sound waves

What kind of evidence can a polarizing microscope help analyze?

• Temperature changes

• Fibers and crystals

• Digital data

• Sound recordings

What is the purpose of using a fluorescence microscope in trace evidence analysis?

• To observe materials that fluoresce

• To magnify items significantly

• To identify chemical ions

• To compare evidence side-by-side

Which instrument is used to identify chemical ions in debris?

• Ion chromatograph

• Fluorescence microscope

• Comparison microscope

• Scanning electron microscope