In this video, students will learn about chemical reactions, with focus on rusting as a chemical process. In a chemical reaction, new substances (products) are formed when reactants are mixed together. Rusting, which is a phenomena we observe in our everyday lives, occurs when oxygen molecules in air react with iron atoms to form rust. As physical changes are always reversible, it is a misconception that all chemical reactions are irreversible. Contrary to this belief, chemical reactions can also be reversible. Moreover, most chemical reactions have a balancing point, not an end point.
This video satisfies the 5-PS1-4 requirement of fifth-grade science proficiency.
Students who demonstrate understanding can: 5-PS1-4. Conduct an investigation to determine whether the mixing of two or more substances results in new substances.
