Matter in Our Surroundings - 1 (Class IX)

This is the correct answer. Plasma contains super energetic particles in the form of ionised gases.

In liquids, there is less space to move, so collisions are more frequent between the molecules causing a slower diffusion rate. The opposite happens in gases. There is more space in gases. As a result, there are less collisions between the molecules causing a faster diffusion rate. Other factors that may have an effect on diffusion rates are temperature, mass of the molecule, volume/surface area and the medium used.

A liquid is a nearly incompressible fluid that conforms to the shape of its container, but retains a (nearly) constant volume independent of pressure. As such, it is one of the four fundamental states of matter (the others being solid, gas, and plasma), and is the only state with a definite volume, but no fixed shape.

Particles of matter in the solid state have strong attractive forces between them. This force, known as the force of cohesion, keeps the particles together. Particles of iron have very strong forces of attraction, and the particles are tightly bonded to each other. So, it is difficult to overcome these forces and hence, break an iron nail. 

When water solidifies to ice, heat is evolved.

Sublimation is the property responsible for the conversion of substances into vapour without passing through the liquid state on heating. 

Plasma is considered as the fourth state of matter. Plasmas are similar to gases. All stars are made of plasma. Because of the presence of plasma, stars glow. Plasma is formed because of nuclear fusion in stars.

The constituent particles of solids are tightly packed and in the absence of inter-particle spaces no object can move through it.
Movement through  the gaseous state of matter is possible due to the large inter-molecular spaces.

When the relative humidity is 100%, no evaporation is generally possible.

With an increase in temperature, the forces of attraction between particles become weak and they start vibrating and finally, change into another form of matter.

The particles of acetone gain/absorb energy from the palm and evaporate, causing a cooling effect.

During the melting of ice, the temperature of the system remains constant at 0^o C,till all the ice melts, eventhough heat is continuously supplied. This is because the heat supplied is used up in changing the state by overcoming the forces of attraction between the particles. As this heat energy is absorbed by the ice without showing any rise in temperature, it is called latent heat of fusion. 

Satyendra Nath Bose and Albert Einstein predicted the fifth state of matter. Thus, it got its name as Bose-Einstein Condensate (BEC).