Students must have the basic knowledge of visual programming (using programming blocks) in the Photon Coding app.
Describe the task:
Ask students to check if the 70 cm distance away from the robot is precisely the same (70 cm) if they use the tape measure. If there is a discrepancy, how can they explain it? How do we call such a phenomenon in physics?
(Answer: it is called the observational error or measurement error).