Use the settings in the Simulation Table. Select the stopwatch. Click the green squared box on the left to open the "Data." Do not remove the divider. Select the timer and stop it at 60 ps. Select the best description. The red molecules move slower than the blue molecules causing the temperature to change. The red and blue molecules move continuously, and some are hitting the walls of the container. The temperature'of the red and blue molecules changes as they hit the walls of the container. The blue molecules move through the divider causing the temperature to decrease.