Fifth-graders experiment with substances that can mix, react, and combine to form new substances using hands-on lessons. In the first lesson, pupils observe how different substances react to form different amounts of gas, leading to a discussion about the particles of the product. Young scientists then explore chemical reactions. They determine the substances that combine to make baking powder and identify which react with water to create a gas. They also use soap and Alka-Seltzer tablets to create different mixtures with water and study their properties, including their ability to produce suds. The fourth lesson in the series has class members explore color change in terms of chemical properties and reactions. They create a pH solution using cabbage leaves and observe the changes when acids and bases are added. Finally, young experimenters explore reactions with substances that look similar. They observe the reactions when combined with baking soda and use indicators to conclude the combinations react differently and record their discoveries on a worksheet.
