Page 8 - Finalll Science BB Prep2 t1 2025_Neat
P. 8
Brownian motion
The random motion of relatively large particles suspended in a fluid in all
directions as a result of their continuous collisions with the molecules of the
fluid.
It was discovered by Brown in 1827.
Ex: pollen grains in water / dust in air.
Plasma
The 4th energetic state of matter in which the gas becomes a mixture of
+ve ions & -ve free electrons. (It has high electrical conductivity)
When gases are heated to high temperature (1000 / million degree Celsius)
they will be ionized (broken into + & -)
First Term 9
