Individual characteristics are unique patterns or features. Example: fingerprints
Class characteristics are a defined pattern or feature that belongs to a group. Example: blonde hair
Wear patterns: Individual characteristic based on the use of an item. Examples: shoes or tires worn more on one side than the other
Soil; shoe print; bare foot print.
Either put soil (like potting soil) in a box or find a place outside that has good soil (like a garden). Look at the characteristics of the soil; color, texture, additives, and moisture levels are good things to note. Make a shoe print by stepping in the soil. Measure the size of the print. Now make a bare foot print (your feet wash so don't be shy) and measure that print. Go to the form and fill it out.