Lesson Plan: Materials - Extraction, Séparation et Identification des Espèces Chimiques

Grade Level: Fourth Level (Scottish Curriculum)

Desired Outcome: I can collect and analyse experimental data on chemical reactions that result in an obvious change in energy. I can apply my findings to explain the significance of the energy changes associated with chemical reactions.

Subject: Sciences

Time: 60 minutes

Resources: - Whiteboard or blackboard - Markers or chalk - Projector (optional) - Handouts with instructions for experiments - Safety goggles - Lab equipment (beakers, test tubes, Bunsen burner, etc.) - Chemicals for experiments (e.g., vinegar, baking soda, magnesium, hydrochloric acid, etc.) - Thermometer - Stopwatch or timer

Introduction (5 minutes): 1. Begin the lesson by asking students if they have ever observed any chemical reactions that resulted in an obvious change in energy. 2. Discuss some examples of chemical reactions that they might have witnessed, such as the reaction between vinegar and baking soda or the reaction between magnesium and hydrochloric acid. 3. Explain that in today’s lesson, they will be conducting experiments to collect and analyze data on chemical reactions that involve energy changes.

Activity 1: Collecting Experimental Data (20 minutes): 1. Divide the class into small groups of 3-4 students. 2. Provide each group with a handout containing instructions for the first experiment. 3. Instruct the students to follow the instructions and conduct the experiment, making sure to record all relevant data, such as the initial and final temperatures, reaction time, and any observations. 4. Circulate around the classroom to provide assistance and ensure safety precautions are being followed. 5. Once the experiment is completed, have the groups share their data with the class by presenting their findings on the whiteboard or using a projector.

Activity 2: Analyzing Data and Applying Findings (25 minutes): 1. Lead a class discussion on the significance of the energy changes observed in the experiments. 2. Ask students to analyze the data collected by the different groups and identify any patterns or trends. 3. Guide the discussion towards explaining the relationship between the energy changes and the chemical reactions that occurred. 4. Encourage students to apply their findings to explain why certain reactions resulted in an increase or decrease in energy. 5. Summarize the key points discussed and ensure that students understand the significance of energy changes in chemical reactions.

Conclusion (5 minutes): 1. Review the main concepts covered in the lesson, emphasizing the ability to collect and analyze experimental data on chemical reactions that result in an obvious change in energy. 2. Ask students to reflect on the importance of understanding energy changes in chemical reactions and how it can help us explain various phenomena in the world around us. 3. Provide an opportunity for students to ask any remaining questions or share any additional insights they gained from the lesson.

Note: It is essential to ensure that all necessary safety precautions are followed during the experiments. Students should wear safety goggles and handle chemicals with care.