Term
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Definition
Everything is made of particles
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A particle is an extremely small unit of matter. |
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Term
| What is the Brownian motion? |
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Definition
Brownian motion
the random movemento of particles in a liquid |
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Term
| Why (random movement of particles in a liquid)? |
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Definition
The random movement of small light particles suspended in water happens because water molecules bombard them.
The random movement of dust in the air happens because gas molecules bombard it |
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Term
| State two ways that can prove that particles exist. |
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Definition
1. The movementof particles from pollen in water
2. The movement of dust in air. |
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Term
| Why does the movement of particles from pollen in water show that particles exist? |
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Definition
| Because it demonstrates that the pollen moves on the surface of the water because it is constantly hit by fast moving water particles. |
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Term
| Define Diffusion (how it happens) |
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Definition
| It is the net movement of molecules from an area of high density to one of low density |
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