random -- the particles go about in a random fashion in a liquid -- cannot predict which direction a molecule of the liquid will hit the particle in the next period of time of significance (seconds or minutes).
True
true
Gas particles are in a permanent and chaotic motion.
true
flase
Liquid water molecules exhibit a greater amount of motion than ice molecules.
It is not true; evaporation occur at the surface of a liquid and the temperature is under the boiling point.
Grains of sand are about to move about in a manner that is similar to the motion of molecules of a true liquid.
It is true
false
Particles in a solid move around very little depending on the material in question however most liquids can move around very freely. Therefore the answer is True.
Yes, it was first observed by Robert Brown in 1827, and it is random movement of particles suspended in a fluid or gas.