Grade 6 students were detectives for a day and they had to solve a crime.
A body was found in an abandoned house with a suicide letter. Everything was very suspicious and there were some doubts whether it was suicide or murder. The letter was the most suspicious piece of evidence and the pen was not found in the crime scene. The students believed the killer still had the pen. They collected a piece of evidence from the letter and compared the ink with the ink of the pens belonging to the suspects. For that, students used the chromatography technique, which is a technique that is used to separate mixtures. Comparing the ink of the letter with the ink of the suspects, they found the assassin!