Immersing Deeper into Particulate Model of Matter

For today's Science lesson, we had been taught more on the Particulate Model of Matter. After this lesson, I had gained a better understanding of how the particles work in matter and how its arrangement and movement change when matter changes states.

3 Thoughts:
1) When the temperature of matter increases, the kinetic energy of its particles also increases. Therefore, we can say that the kinetic energy of all particles is directly equivalent to the absolute temperature.
2) The process whereby particles of matter move from a region of higher concentration to a region of lower concentration is known as diffusion. Diffusion occurs in all three states. However, diffusion in gases is the fastest as the particles in gases move at the fastest rate as compared to the particles in liquids and solids.
3) The arrangements and movements of particles are different when the matter is in different states.
Particles in solids - They have a fixed, regular pattern as they are packed very closely together, strongly attracted to each other and vibrate about their fixed positions.
Particles in liquids - They are not arranged in a fixed, regular pattern as they are packed closely together, attracted to each other and can move over short distances.
Particles in gases - They can move freely in any direction as they are weakly attracted to and far apart from one another.

2 Questions:
1) Since solid particles are strongly attracted and packed very closely to one another, how does a solid diffuses?
2) Do different particles have different sizes?

1 Useful application:
1) When younger brother or sister inquires why ice melts, we can slowly explain to them about the phenomena of how the arrangements and movements of the particles change due to the heat that is gained by the ice.

(Only gas can be compressed)

Sources: Google Images