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In this animation the grey [[particle]]s represent [[particle]]s too small to see. The yellow [[particle]]s represent [[particle]]s that are big enough to see and the blue lines show the random path of the yellow [[particle]]s.
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==Key Stage 4==
===Meaning===
[[Brownian Motion]] is the seemingly random movement of very small, visible, [[particle]]s when viewed under a [[microscope]].
===About Brownian Motion===
: Brownian Motion is [[Scientific Evidence|evidence]] of the [[Particle Model|particle model]] of [[matter]].
: When viewed under a [[microscope]] small [[object]]s like a [[pollen]] grain or tea leaf seem to change direction randomly.
: [[Brownian Motion]] can be [[explain]]ed if the small [[object]]s are being hit by other, even smaller [[object]]s that cannot be seen. This is [[Scientific Evidence|evidence]] that [[matter]] is made of [[particle]]s.
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|[[File:Brownianmotion.gif|center]]
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In this animation the grey [[particle]]s represent [[particle]]s too small to see. The yellow [[particle]]s represent [[particle]]s that are big enough to see and the blue lines show the random path of the yellow [[particle]]s.
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===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Brownian motion, page 87, GCSE Physics; Third Edition, Oxford University Press, AQA '']