>
· You're looking at smoke particles in air under a microscope
· They appear to be jiggling about
· Why?
· (Don't worry if you can't work this out straight away - Albert Einstein was the bloke who eventually explained what's happening here!) 5.11 28 October 2011 11:10
· 5.11 understand the significance of Brownian motion
> Model 1
· What does the red puck represent?
· What do the metal balls represent?
[cid:image001.png@01CC9989.A14EFF60]
[cid:image002.png@01CC9989.A14EFF60]
> Model 3
· What do the "smoke" particles look like?
· Why are they moving?
· What do the "air" particles look like? 5.11 explained 28 October 2011 11:10 Model 1
· What does the red puck represent?
o The large, visible smoke particle
· What do the metal balls represent?
o The small, not visible air particles Model 2
· What do the small red particles represent?
o The small, not visible air particles
· What does the large blue particle represent?
o The large, visible smoke particle
· What does the view on the left of the screen represent?
o The view through the microscope lense
· Why can‘t you see the red particles in this view?
o They are too small to see Model 3
· What do the "smoke" particles look like?
o They are the 5 large, sand coloured particles
· Why are they moving?
o Small, fast moving air particles are colliding with the smoke particles and making them move
· What do the "air" particles look like?
o They are the numerous, small, white particles 5.11 Questions 02 November 2011 17:21
1. Draw the path of a smoke particle in air - IN PICTURE
2. Explain what is meant by Brownian Motion of smoke particles in air and how it provides evidence for air particles - Incessant motion of matter due to thermal energy.
3. What change would you expect to see in the movement of the smoke particles if the air was cooled down? Why? - Slower movement because the warmer the temperature the more movement. 
· You're looking at smoke particles in air under a microscope
· They appear to be jiggling about
· Why?
· (Don't worry if you can't work this out straight away - Albert Einstein was the bloke who eventually explained what's happening here!) 5.11 28 October 2011 11:10
· 5.11 understand the significance of Brownian motion
> Model 1
· What does the red puck represent?
· What do the metal balls represent?
[cid:image001.png@01CC9989.A14EFF60]
[cid:image002.png@01CC9989.A14EFF60]
> Model 3
· What do the "smoke" particles look like?
· Why are they moving?
· What do the "air" particles look like? 5.11 explained 28 October 2011 11:10 Model 1
· What does the red puck represent?
o The large, visible smoke particle
· What do the metal balls represent?
o The small, not visible air particles Model 2
· What do the small red particles represent?
o The small, not visible air particles
· What does the large blue particle represent?
o The large, visible smoke particle
· What does the view on the left of the screen represent?
o The view through the microscope lense
· Why can‘t you see the red particles in this view?
o They are too small to see Model 3
· What do the "smoke" particles look like?
o They are the 5 large, sand coloured particles
· Why are they moving?
o Small, fast moving air particles are colliding with the smoke particles and making them move
· What do the "air" particles look like?
o They are the numerous, small, white particles 5.11 Questions 02 November 2011 17:21
1. Draw the path of a smoke particle in air - IN PICTURE
2. Explain what is meant by Brownian Motion of smoke particles in air and how it provides evidence for air particles - Incessant motion of matter due to thermal energy.
3. What change would you expect to see in the movement of the smoke particles if the air was cooled down? Why? - Slower movement because the warmer the temperature the more movement.
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