Page 260 - Demo

Forensics
Flinn Forensic Files, continued
Flinn Forensic Files—Ink Inspection
By: The Flinn Staff
Imagine the panic of discovering that $20,000 is
missing from your checking account! When Alyson Marie Combs discovers her bank account has been emptied by someone forging her signature on a check, she is determined to work with law enforcement to find the culprit. Investigators gathered six different types of pens from the bank that may have been used to forge the signature. Students act as forensic scientists by analyzing the components of each type of ink using radial chromatography. Watch the excitement grow as they determine the instrument used to forge Ms. Combs’ signature. Never before has chromatography been so captivating!
Complete for 30 students working in pairs.
Forensics—Ballistics
Flinn Forensic Files—Ballistics
See page 256.
Gunshot Residue—
Forensics Demonstration Kit
By: The Flinn Staff
When a gun is fired, a series of chemical reactions occurs and chemi- cals are quickly dispersed into the surrounding environment. The chemicals are likely to be on the gun, in the gun, on the shooter, in the air, on nearby objects, and on objects struck by the bullet. Learn the chemical tests used by forensic scientists as they track down gunshot residue. Revealing these unseen telltale chemical residues can be very significant at a crime scene and very motivating for your students. The kit contains enough chemicals to perform the demonstration tests at least seven times.
Concepts: Firearm chemistry, nitrate testing, lead testing, false posi- tive, false negative, presumptive test.
Time Required: 15 minutes
Materials Provided: Cotton swabs, Beral-type pipets, diphenylamine solution, sodium rhodizonate solution, lead nitrate solution, copper nitrate solution.
Understanding Bullets Set
By: The Flinn Staff
Bullets are often an important piece of forensic
evidence. They can link a certain gun to a crime, which may then provide a suspect. Before matching bullet striations to specific weapons, it is helpful to be able to identify different types of bullets. This set of seven bullets includes the following types: jacketed, semi- jacketed, hollowpoint, semi-jacketed softpoint, lead round nose, semi-wadcutter and wadcutter. These hands-on examples are sure to engage students in forensic studies! Includes information that details the physical characteristics each type of bullet. This school-safe set does not include cartridge case, primer or gunpowder.
1-800-452-1261
flinnsci.com
258
Catalog No.
Description
Price/Each
AP7745
Flinn Forensic Files—Ink Inspection
$64.10
Flinn Forensic Files—Ink Inspection AP7745
Gunshot Residue—Forensics Demonstration Kit FB1645
Catalog No.
Description
Price/Each
FB1645
Gunshot Residue—Forensics Demonstration Kit
$42.05
Understanding Bullets Set AP7921
Catalog No.
Description
Price/Each
AP7921
Understanding Bullets Set
$23.85