What is the most likely reason that the red liquid inside of a thermometer moves up when it is heated?A.The particles in the red liquid move faster and come together.B.The particles in the red liquid move faster and spread apart.C.The particles in the red liquid move slower and come together.D.The particles in the red liquid move slower and spread apart.
B. The particles in the red liquid move faster and spread apart.
When the thermometer is heated, the particles in the liquid gain kinetic energy and move faster, causing them to spread apart. This leads to an increase in volume and a rise in the level of the liquid inside the thermometer.