Question

state two characteristic of matter demonstrated ....diffusion .....brownian 
motin

Answer 1

Two process which provides the best evidence for the motion of particles in matter are :

1. Brownian Motion 
2. Diffusion.

Brownian Motion 
---> The best evidence for existence and movement of particles in liquids was given by Robert Brown.
----> The zig zag movement of the small particles suspended in a liquid[gas] 

Diffusion:
The spreading and mixing of a substance with another substances due to its motion of its particles is called as Diffusion.

The existence of Brownian motion and diffusion gives us two conclusion about:
---->that matter is made up of tiny particles.
---->That the particles of matter are constantly moving.