List two processes from which it may be concluded that the particles of a gas move continuously.

(N/A) The continuous movement of gas particles can be concluded from the following two processes:
$(i)$ Diffusion: This is the process where particles of different gases intermix spontaneously due to their random motion and high kinetic energy. For example,the smell of perfume spreading across a room.
$(ii)$ Brownian Motion: This is the random,zig-zag motion of particles suspended in a fluid (gas or liquid) resulting from their collision with fast-moving gas molecules.