(a(i))[2]
On Fig. 5.1(b), Draw one possible path for the smoke particle.
(a(ii))[2]
Describe how air molecules make the smoke particle follow the observed path.
(b)[4]
Explain, in terms of the molecules of the gas, why this occurs.
Physics 0625 · IGCSE · Kinetic particle model of matter
Kinetic particle model of matter — practice question
A microscope with very high magnification is used to view the Brownian motion of smoke particles in air. Fig. 5.1(a) shows the apparatus set up with the microscope. Fig. 5.1(b) shows the view through the microscope and one of the smoke particles being observed.