For both the subunits, basic knowledge on biology, physics, chemistry and mathematics is required at the level the module is written for. The activities in this subunit 2 introduce students to the following concepts and ideas:
- Mechanics in collisions (impetus, kinetic energy, inertia).
- Working with models to simulate reality (it is not possible to do experiments on living
people in the ballpoint case). - Memory and the reliability of witnesses.
- Doing real and accurate measurements on pictures.
- Face recognition.
- Properties of DNA and the fact that DNA is unique.
- Techniques to isolate, multiply and analyse DNA
- Gathering evidence from pictures of a crime scene
- Inferring suspect features from the pictures