330 Week 5 Toolmarks

The tool machining process is what creates the peaks & valleys on tool edges.

• True

• False

What is the most difficult aspect of toolmark comparisons?

• Duplicating the mark in the lab

• Determining if the tool was impressed or dragged

• Knowing which tool to test

• Knowing what medium to use to make the test mark

The suspect tool and the toolmark can be packaged in the same container as long as there's enough material between them.

• True

• False

What is in-situ collection of a toolmark?

• Taking a cast of the mark

• Collecting the object with the mark

The cast of the actual toolmark is called a

• negative cast

• positive cast

Features that take an object down to a very small group within a larger group are referred to as:

• class characteristics

• subclass characteristics

• general characteristics

• individual characteristics

The lines a screwdriver leaves when it's pulled across an object is an example of:

• striated marks

• impressed mark

The casting material for a toolmark should be:

• Plaster of Paris

• Mikrosil

• Dental Stone

• Impression Wax

Changing the angle of light can better show striations.

• True

• False

Tags

NGSS.MS-PS4-2

You cast a toolmark with Mikrosil and the cast has an air bubble that blocks some of the striations. What do you do?

• Cast it again

• Use a different casting medium

• Nothing--work with what you have