Conservation of Mass Lesson Plan: Next Gen Science Framework: Outline: MS-PS1: Chemical Reactions. Conservation In this lesson, students will learn the Of Mass difference between physical and chemical changes and their relationship “The amount (weight) of matter is to the Law of Conservation of Mass. The conserved when it changes form, even in major concept that students should learn transitions in which it seems to vanish (e.g., is that mass is conserved when substances undergo a physical or sugar in solution, evaporation in a closed chemical change (Law of Conservation of container).” Mass). Lesson Objectives: - - Students will know the difference between a physical change and a chemical change. Students will be able to design an experiment to determine the effect on mass when a substance undergoes either a physical change or a chemical change. Students will understand that mass is conserved when substances undergo physical and chemical changes (The Law of Conservation of Mass). Keywords: • • • • • • Mass Matter Open System Closed System How to use a triple beam balance Law of Conservation of Mass 1. Activation Phase (10 minutes): - Teacher-Student Talk: “What will happen to things when they are burned? - Experiment: Burning wire wool on a scale. Weight will go up. - Cognitive Dissonance: Burning things doesn’t make them disappear, the weight can even get higher. 2. Main Phase (25 minutes): - What is burning? Chemical reaction with oxygen. à Chemical Change - What is the difference of a chemical reaction to physical change? - Explaining the law of conversation of mass. Experiment sugar in water. 3. Consolidation Phase (10 minutes) - How can we design an experiment that proves, that the mass is conserved when burning wire wool? - Homework: Name 5 chemical and 5 physical changes you know from your daily life.