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 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 allow you to see striations better.

• 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