Base your answer to the following question on the diagram below, which represents a paramecium observed by a student using the low power
objective (100x) of a compound light microscope. The approximate length
of the paramecium is
1.D
1.6 mm
Microscope Field of View
40 um
O 160 um
300 um
O 700 pm

Well ads I remember, the motion of the gas particles is random and in a straight-line. A sample of gas is contained in a closed rigid cylinder.

And here is what I found too -

According to Kinetic Molecular Theory, gaseous particles are in a state of constant random motion; individual particles move at different speeds, constantly colliding and changing directions. We use velocity to describe the movement of gas particles, thereby taking into account both speed and direction.