Worksheet

Paint or ink

Each Cub to make their fingerprints on their worksheet using ink or paint

After washing their hands, they can use the microscope to look at the details closely.

They are to identify what types of patterns appear on their fingerprints.

3 major types of fingerprints include:

Arch: Only a few, that is close to 5% have this type of fingerprint. An arch doesn’t have any delta, lines, or cores.

Whorl: 25-35% of fingerprint patterns are whorls. Whorls have at least two deltas and a core. Any fingerprint pattern that contains equal or more than 2 deltas will be a whorl pattern.

Loop: 60-70% of fingerprints patterns are loops. These are the most common fingerprint pattern. Loops pattern must have one delta and one core.

Within these three categories of fingerprints, there are more sub categories of these patterns of fingerprints. These are including:

Arch: Arch is divided into two categories, Plain Arch and Tented Arch.

Whorl: Whorl is also divided into two parts, Plain Whorl and Central Pocket Whorl.

Loop: Loop is divided into three parts; Ulnar Loop, Radial Loop, and Central Pocket Loop.

Double Loop Whorl: Double loop whorl appears to be two distinct loops that surround each other in opposing directions.

Accidental: In short, any pattern that does not match with any of the previous fingerprint types.

Accidental type fingerprint patterns possess at least two characteristics of the tented arch, whorl or loop families combined. The plain arch is not included in this pattern because it lacks distinctive characteristics.