This week our 6B students had an incursion with Joel Booth from Murdoch Science Outreach. A crime scene investigation was brought to life in this workshop. The students explored the chemical properties (such as solubility and pH) of different white powders and then used their reasoning skills to identify an unknown substance recovered from a crime scene.
The workshop commenced with Joel putting on his white lab coat and talking to the students about the investigation.
Here are some images of the students using the pH indicator to identify which colour their solution matched with on the pH scale.
Each team of students had four powders to investigate.
The students also did an iodine test with Betadine to test their powder for starch.
The final activity was to identify two ‘mystery powders’ and then use their skills from the first part of the lesson to work out what these powders were. Each team had success with this as they were able to work out what their powders were.
Joel will be returning to St Emilie’s next week to conduct the investigation with 6G. It was a great experience for the students to work with a chemical sciences student and to hear about Joel’s experiences in the lab and his plans for a career in chemical sciences.