Question

Please please please please answer this?
Particles in liquid and gases show random motion? What does it mean and why does it occur?
Why do we feel cold when you wear cotton clothes in summer?
Generally liquids have low density, than solids but you must have observed that ice floats on water why?
We can easily move our hand in air but to do the same through a solid block of wood we need a karate expert?

Answer 1

particle of liquid and gases show random motion because it it has kinetic energy between them
we feel cold because cotton cloth absorb heat or sweat in our body
ice float on water because liquid has more density than solid in sea or where water is more.