Purpose of Sketch Portrays physical facts

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Presentation transcript:

Purpose of Sketch Portrays physical facts Specifies an exact location of evidence at scene Provides a mental picture

Rough or Final Sketch… Why?!

Measuring What units should you measure the crime scene in? __________________________ In science we use the ______________ ______________. Why do scientists use this system?

Step 1: Rectangular Coordinates Use 2 adjacent (next to each other) walls Measure at right angles (90)

Step 2: Measure length & Width of crime scene

Step 3: Final Sketch - Scaling Helps avoid distortion Each block represents a specified length. Count the number of blocks along the length and width. Round your length to a whole number that is divisible by the number of boxes. Divide by the number of boxes.