Physics (Essay) Paper 2 WASSCE (SC), 2016

Question 3


State three different materials that can be used to demonstrate brownian motion.




This is a popular question among candidates. Majority of the candidates correctly answered the question but some of the candidates who performed poorly failed to mention specifically the words “particle” or “crystal” or “grains” where necessary.


The expected answer is among the following:


Smoke particles, carton particles, dust particles, pollen grains, chalk particles, potassium permanganate crystal etc.