Organisms have to react to change in their environment (both internal and external) to stay alive.
This online lesson was written for GCSE science students.
The lesson is suitable for combined science students and biology (separate science) students. The curriculums of the various exam boards vary slightly, so I chose to focus here on the learning objectives of topic B5.2 of the OCR ‘ Twenty First Century Science’ course – GCSE (9-1) Combined Science B.
Try out these online reaction tests. Don’t forget to note down your scores so you can share your results.
- Stoplight online test – make a note of your average response time. Mine was 0.2974s – can you beat that?
- Reaction time benchmark test – make a note of your average response time. Mine was 0.264s – can you beat that?
- Car stop reaction game – I like this one because it calculates your age based on your reaction time, and it said I was 26!
Finally, if you haven’t seen it yet, I recommend this video that documents the work of citizen scientists to better understand the reaction of domestic cats (Felis catus) to an unexpected visual stimulus by Cucumis sativus.