Question

name two process which provides the best evidence for the motion of particles in matter

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.

Answer 2

Following are the types which give the best evidence for the existence and movement of particle in liquid.

1. Brownian Motion:

It clarifies how moving fluid and gas particles interact with each other. Additionally it helped in demonstrating the presence of molecules and atoms as the basic constituent of issue. Brownian movement prompts arbitrary development of dust particles or pollen while suspended in a fluid or gas. In this way is clarifies the development of molecule.  

2. Diffusion:

It is when particles or objects move from a region of higher fixation to a territory of lower focus. Concentration alludes to the amount of a specific object or molecule is in a given space. So in the case of the train for example, you went from a territory of higher grouping of individuals to a region of a lower centralization of individuals. This implies you experienced the procedure of diffusion.