After reading the material by ourselves for homework, Mr. Curran clarified the subjects by giving us several easy to understand examples on the blackboard. For example, one subject addressed in the lab and text was physical and chemical changes. Mr. Curran made this subject very clear to us by giving us an example of each, and then stating why it goes under its category, and the difference between it and other examples in the other category. By doing this, Mr. Curran made the text very understandable and made the lab activity all the easier to perform. This lab is also closely related to real life.
Substances change states all the time in ordinary life.
For example, putting two cubes of ice in your drink is a fairly common ritual performed by many over the summer. After a while, due to the increasing temperature of it's surroundings, the ice changes state from a solid to a liquid, just like what happened in the beginning of this lab activity. Then, if one wants to form ice, he puts the water into a freezer. The water then undergoes a cooling curve down until it freezes, at it's freezing point, what we did in the second part of this lab activity. This lab did not contain many real sources of error.