![]() ![]() Have students consider people who experience and use physical and chemical changes in their jobs, for example:.Students could also learn about the computational concept of inputs and outputs by identifying the inputs of a chemical reaction (e.g., baking soda and vinegar) with the outputs of the reaction (e.g., gas bubbles).Refer to this guide to better understand how students could do this. Students could use Scratch to practice coding skills by sorting images into physical and chemical changes.For example, if bubbles form then it is a chemical reaction, or if it melts then it is a chemical change. Conditional statements give rules to direct the flow of what happens, such as if something is true, then something will happen or else something else will happen. Have students write conditional statements for identifying if a change is physical or chemical.Students could create a poem or rap in which they define and give examples of physical and chemical changes.Assure students that the symbols help us know how to safely use and dispose of the products so there is no harm to us or to the environment. ![]() You could bring in empty containers bearing these symbols and discuss with students what they think the symbols might mean and why they are placed on these products. Students may wish to explore the meaning of these international symbols that give us information on the safety of substances.For example, they could consider weather-related situations such as when rain turns to sleet or freezing rain. Students may wish to explore how changes in solids and liquids impact them, their families, the community and the environment.Students could try mixing different types of liquids to look for evidence of physical or chemical changes.It is highly recommended that students follow up this lesson with the Mystery Powders lesson.To help students keep track of the experiment over the course of the week, use the Physical and Chemical Change Experiments Predict and Observe Chart reproducible to monitor the changes day by day. ![]()
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