This illustrates that a given substances energy level increases as it changes from solid to liquid, to gas and that this increase in energy is evident by measuring the temperature of the substance as it absorbs heat energy and changes states. Sap is a solution of sugar molecules and minerals dissolved in water. Students may classify common solutions and mixtures based upon some simple criteria. In a solution, the parts of the solution are not distinguishable, the solution is transparent and these criteria are permanent, meaning the parts of the solution will not settle. In a mixture, the parts making up the mixture can be seen as separate components that may settle with time and are not transparent.
Classification can sometimes be difficult.
Researching regions of maple syrup production.