1) Draw the path of a smoke particle in air (3 marks)
It vibrates and moves around the area in random directions. (See the attachment)
2) Explain what is meant by Brownian Motion of smoke particles in air and how it provides evidence for air particles. (4 marks)
Brownian motion of smoke particles is where smoke particles move in random motion without any outer force exertion. This happens because the air particles surrounding the smoke particles move about in random motion moving the smoke particles about. Smoke particles moving by themselves shows that there are air particles around it causing such movement. 3) What change would you expect to see in the movement of the smoke particles if the air was cooled down? Why? (2 marks)
The motion would be smaller because lower temperature means lower kinetic energy. This means there will be fewer collisions between air particles and smoke particles.
It vibrates and moves around the area in random directions. (See the attachment)
2) Explain what is meant by Brownian Motion of smoke particles in air and how it provides evidence for air particles. (4 marks)
Brownian motion of smoke particles is where smoke particles move in random motion without any outer force exertion. This happens because the air particles surrounding the smoke particles move about in random motion moving the smoke particles about. Smoke particles moving by themselves shows that there are air particles around it causing such movement. 3) What change would you expect to see in the movement of the smoke particles if the air was cooled down? Why? (2 marks)
The motion would be smaller because lower temperature means lower kinetic energy. This means there will be fewer collisions between air particles and smoke particles.
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