Gas particles move very quickly (air particles move at 500 m/s on average at room temperature). However, a smell does not travel this fast. This is because its particles collide with each other and with particles of air very frequently. They change direction randomly when they collide, so it takes much longer to travel from one place to another. Their random motion because of collisions is called Brownian motion.
Very good description but did you copy and past it or just us the internet because there is stuff in there that we have not learnt yet
it is very detail but the first part doesn't have any thing do with our work so don't copy from email
The dust particles are moving around because the gas that is surrounding it is pushing it randomly .But if you put pollen in water now the water particles are pushing them around also in random directions.This is called the Brownian motion because the person who created it was called Brown.He thought that the particles we're alive but not until later scientists found out that the particles were not alive.
WWW: It was very detailed and very thoughtful.
EBI: Could research more and care more about punctuation.
Brownian motion is the motion happens when the dust particles move by they self, but actually they didn’t move by they self the particles in gas pushes it ,and it will move randomly. The first people find this rule is a science name Robert Brown. He look at water pollen by a microscope than he thought the pollen was alive but it can move randomly is because the particles push it .
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