There are many simple ways to illustrate ways in which solids can change to liquids. In this activity familiar materials, such as water, crayons, and food items, are used to illustrate the way in which matter changes form. These ideas can be done over a number of different lessons, depending upon the levels of the students. For students who are blind or visually impaired, they have not had the benefit of the incidental learning that takes place through informal observation. In other words, they will not have watched an ice cube melt in their glass and thus may not be aware that nothing was added or taken out of the glass, but that the ice cube changes form in warmer air temperatures.
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