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World 2 · Fingerprints: Loops, Whorls and Arches · 10 min · PRO

Ridges on your fingertips: what makes a print

Sweat, oil and a pattern you grew before you were born

PRO · Forensic Science

World 2: Fingerprints: Loops, Whorls and Arches is part of PRO

The first world of Forensic Science is free. PRO opens the other 22 lessons in 6 worlds — simulations, quizzes and all.

  • Loops, whorls and arches: three pattern families
  • Minutiae: the tiny details that decide a match
  • How sure can we be? Uncertainty and examiner bias
  • Splitting a colour: how paper chromatography works
  • Rf values: putting a number on a colour
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  • Practice exams and certificates

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← Class and individual evidence: how specific is a clue?Loops, whorls and arches: three pattern families →

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