In Social Studies, the students found several tables in the science lab pushed together, scattered with pop cans, pens, papers, snack wrappings and other clues. All of these was roped off with yellow crime scene tape. They made their observations about the evidence present and infered who participated. For example the language arts teacher only drinks Diet Coke and the Reading teacher is often seen to snack on Doritos. An earring was discovered to belong to the Librarian when she began to ask students and teachers if they'd seen a heart shaped earring.
Fingerprints are impressions created by ridges on the skin.
On the tips of fingers, palms of hands, soles of feet, the skin has tiny ridges that provide traction to help us grip things. Everyone has a unique pattern of skin ridges. These ridges form before a baby is born and maintain their pattern throughout life. As you grow, the pattern gets larger, but it does not change. When a person touches an object, perspiration, oils and amino acids on the skin are transferred to the object.