Div B – Middle School
NC Essential Standards Alignment:
6.P.2, 8.P.1, Science as Inquiry
See the National rule manual
Event Score Sheet:
National Event Page:
Students must bring and wear goggles, an apron or a lab coat, and have skin covered from the neck down to the wrist and toes. Gloves are optional; but if a host requires a specific type, they must notify teams. Shoulder length hair or longer must be tied back. Students who unsafely remove their safety clothing/goggles or are observed handling any of the material or equipment in an unsafe manner will be penalized or disqualified from the event.
NC Only: 3. NC regionals will only be focusing on parts 3.c (Qualitative Analysis of solids and metals) 3.d (Hair and Fibers), and 3.f, ii and v. (DNA and Splatters). There will be at least one mixture at regional tournaments. Other topics listed in the rules will not be addressed at regionals, but MAY be covered at the state tournament. Additional questions may be asked on general lab safety and procedure and chemical and physical properties and common uses of the substances in part 3.c. updated 9/6/2018
This is a Lab based event. Teams will be given a crime scenario which they will be asked to solve based on evidence they gather and test.
The evidence topic for 2018 in NC is Powders, Recyclable Plastics, and Shoeprints, tire treads, and soil. Teams will then be asked to analyze the information they have gathered to identify a suspect and solve the crime.
Teams MUST bring chemical splash goggles, safety gear, and a writing instrument. Teams may also bring spot plates, test tubes and test tube holders or any containers in which they can perform the tests, popsicle sticks, spatulas, plastic spoons, etc. for handling materials, pH paper, a ruler, hand lenses or loupes, paper towels, a disposable cup for solid waste, writing instruments, 1 sheet of paper with information in any form from any source. Sheet protectors are encouraged. Each team may bring any or all of the items listed as Recommended Lab Equipment for Division B Chemistry Events, posted on soinc.org. Students not bringing these items will be at a disadvantage. The supervisor will not provide them. Teams may bring only specified items. Other items not listed, including calculators, are prohibited. The event supervisors will check each team’s equipment, confiscate non-allowed items, and have the right to penalize the team up to 10% if additional equipment is brought to the event. updated 9/11/2018
***SAFETY ISSUE*** In addition to OSHA approved chemical splash goggles with indirect vents, teams also MUST wear closed toed shoes, pants/skirts that cover legs to the ankle, AND a lab coat/apron that reaches below the knee or they will not be allowed to participate. Long hair must be tied back. In addition, any teams seen handling materials in an unsafe manner will be disqualified from the event. ***SAFETY ISSUE***
Event Leaders will provide a proper lab environment, all evidence to be tested, additional equipment necessary to perform tests on the evidence, the official test and answer sheet.
High score wins. Points are earned for proper identification of evidence as well as analysis of the crime. Ties will be broken by the best Qualitative Analysis (3.a.) score. The only category that we aren’t covering in NC at Regionals is Part E, Chromatography for 5%, and since percentages are approximate, those points will end up distributed in other sections where it makes sense.
– Be sure to follow all safety requirements! Safety issues will NOT be arbitrated.
– Event leaders will not answer questions on testing procedures (for example- how to perform a burn test on fibers) nor will they provide a copy of the rules or a list of the possible unknowns. Teams should already know procedure, and should include a list of the possible unknowns in their allowed notes if they cannot remember. Event leaders WILL answer safety questions, and stop students from performing a test in an unsafe manner.
General sites on Forensics and Crime Busters
Forensic checklist of links, activities, and notes
Zeno’s Forensic site with links to real world stuff
Forensic Science Course Outline
Scienceman’s notes on Forensics
Real World—Articles on aspects of crime scene data collection
The Thin Blue Line. Descriptions of Blood, Bugs, DNA, and Ballistics
Forensics in the Classroom—activities!
Links to forensic activities for students
SO Sample exams for Forensics and other events
Polymers and Fibers:
American Chemistry—Teaching Plastics:
Plastics Info—video clips of how to determine densities of polymers
Polymer density lab
Microscopic Images of Fibers—search for the types of fibers and select the kind of microscopic technique for the image you want.
Animal Hair Images
Sample fiber identification flow chart
Intro to Chromatography
How To Do Paper Chromatography with students
How to calculate the Rf value for a chromatogram
Tutorial on Interpreting Mass Spectra
Basic info Mass spectroscopy