Students will also observe pickle slices and whole pickles. Talk about the differences between the cucumber and pickle slices. Children may respond by answering that a chemical and physical change occurred. Children should be able to note a change in color, taste, and texture. Let the children observe a sheet of paper.
Teacher burns part of the paper.
Discuss fire, smoke, odor, and colors. The paper has undergone a chemical change. The original substance has changed to something else and can't be returned back to the original substance. Demonstrate making orange soda. Fill a glass, one half full of water, and the other half full of orange juice.