Page 5 - Shot In The Dark Bullet Striations
P. 5
Teacher’s
Notes
hese notes are provided to assist in the RUNNING THE LAB
preparation and execution of the laboratory During Lab 1, students may examine the
Texperiment. A solutions key for the preand bullets under a magnifying glass or, if available,
post-lab questions can be found on pages 11 and 12, microscope. Both experiences are valuable
respectively. and will show different depths and sizes of
striae. When using the microscope, the lowest
magnification should be used. If the bullet is too
greatly magnified, students will have a difficult time
SUPPLIES discerning the striae.
Inventory the supplies included in the lab kit.
Supplies have been provided for up to six During Lab 1, if desired, students may trade their
groups of students. bullets with another group so that they may
examine two bullets fired from the same gun. This
Two sets of fired bullets per group is an optional enrichment activity to be performed
(12 bullets total) if time permits.
Photo of microscopic bullet striae from
the evidence bullets The web activity portion of this lab may be found at
www.firearmsid.com.
Magnifier for each group (6 total)
Click on Resource Area > Virtual Comparison
Microscope
During the web activity, students will be
OTHER SUPPLIES AND able to virtually manipulate bullets under a
EQUIPMENT REQUIRED
comparison microscope. On the Supplemental
Materials section for this kit on www.
Rulers for each group
LyleAndLouise.com, there is a tutorial for the
Computer with Internet access for each group comparison microscope. If struggling with the
Microscope for each group (optional) tool, students may desire to watch the tutorial
within their group.
THE MYSTERY OF LYLE AND LOUISE 5
