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Chemistry IGCSE Revision
two year course revision
6
Chemistry
10th Grade
04/12/2016

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Cards

Term
Particles
Definition

Everything is made of particles

.

A particle is an extremely small unit of matter.

Term
What is the Brownian motion?
Definition

Brownian motion 

the random movemento of particles in a liquid

Term
Why (random movement of particles in a liquid)?
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

Term
State two ways that can prove that particles exist.
Definition

1. The movementof particles from pollen in water

2. The movement of dust in air.

Term
Why does the movement of particles from pollen in water show that particles exist?
Definition
Because it demonstrates that the pollen moves on the surface of the water because it is constantly hit by fast moving     water particles.
Term
Define Diffusion (how it happens)
Definition
It is the net movement of molecules from an area of high density to one of low density
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