Most Challenging Scientific Concepts for High School Students
(based on my experience as a teacher).
1. Newton’s Second Law of Motion (F=ma or F=mdv/dt)
2. The concept of the mole in chemistry.
3. Redox Reactions and its applications in electrochemistry.
4. Genetic Recombination.
5. Circular motion.
6. Lenz’s Law in Electromagnetism.
7. Acid-Base Buffering.
8. The working of the Electron Transport Chain.
9. Gibbs Free Energy
10. Angular Momentum.