Monday students selected another taster session for term 2 in Talent Development. Marlene introduced some Science for this session, so yesterday we turned into CSI detectives, and also criminals! The Science of fingerprints was our new learning. No two people have been found to have the same fingerprints, they are totally unique. There's a one in 64 billion chance that your fingerprint will match up exactly with someone else's.
To create an ink fingerprint, the person's finger is first cleaned with alcohol to remove any sweat and dried thoroughly. The person rolls his or her fingertips in ink to cover the entire fingerprint area. Then, each finger is rolled onto prepared cards from one side of the fingernail to the other. These are called rolled fingerprints. Finally, all fingers of each hand are placed down on the bottom of the card at a 45-degree angle to produce a set of plain impressions. These are used to verify the accuracy of the rolled impressions.
We had a lot of fun learning about whorls, arches, and loops, and relating this to our Patterns concept.