Forensics Unit 4

Which is not a method for collecting a toolmark on a doorframe?

• photography

• a rubbing of the mark

• casting that portion of the frame

• removing that part of the frame

Which conclusion can be made when radial cracks from impact A on a glass stop at the radial cracks of impact B?

• Impact A happened first

• Impact B happened first

Which conclusion can be made when radial cracks from impact X on a glass stop at the radial cracks of impact B?

• Impact B happened before impact X

• The force of impact B caused the breaks of impact X

Which tool made these marks?

• hammer

• wrench

• saw

During which process of glass manufacturing does the glass flatten out?

• floating on tin

• melting the mix

• annealing

During which process of glass manufacturing does the glass become a solid without crystallizing?

• washing, drying, and cutting

• annealing

• floating on tin

Which is a major mineral that makes up sand? 

• quartz

• obsidian

• dolomite

• clay

Which substance would be predominant in the topmost layer of soil?

• quartz

• calcite

• humus

• clay

Which has a sticky texture?

• sand

• silt

• clay

Which technique would be best for bringing out the details of an oily footprint or shoeprint?

• casting with sulfur

• photo with direct light

• use dusting powder