On a thermometer celsius scale divides the two fixed points into __________? 

A thermometer is a device that measures temperature  (the degree of hotness or coldness of an object). It has a celsius scale to note down the temperature readings. The lower fixed point of the celsius scale is 0 degrees and the upper fixed point is 100 degrees. The difference is 100 degrees.

Hence, on a thermometer, celsius scale divides the two fixed points into 100 parts.