Question

As the temperature of a sample of gas decreases, the kinetic energy of the particles _____.

Answer 1

Hello friend!

We know that kinetic energy is the energy possessed due to the motion of the object.
And we know if the object is in a fast motion then the temperature would be high, whereas if the object is slow in motion then it will have lower temperature. 
So we know that the kinetic energy is indirectly related to temperature.
From our knowledge we can conclude that HIGHER THE TEMPERATURE, HIGHER THE KINETIC ENERGY and LOWER THE TEMPERATURE, LOWER THE KINETIC ENERGY.

Hence, the answer to your question here is, DECREASES.

Hope it helps!!
All the best!!