Room Temperature and tap water

On Monday afternoon, we (Katelyn, Kiki, Thomas and I) did a science investigation. 

There was one hot jug of water and one cold jug of water.They were both different temperatures to the room temperature so we tested how long it took to go back to room temperature which was about 19 ° C. Now in our classroom its. 21.1° C

We made sure we kept it a fair test by using the same amount of water, taking the measurements in the same place, sticking the probe in fr the same amount of time and leaving the same amount of time for it to cool down or warm up in between.