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Activity 1 GRADES K-12 Materials: In the Box Safety goggles Plastic beaker Measuring spoon Re-sealable plastic bag Yeast Wooden splints Matches or lighter Provided by User A glass of water Hydrogen peroxide Worksheets None Reference Materials None Key Terms: None A Demonstration on Producing Oxygen Time Requirements: 20 minutes Objective: In this activity, students will learn about properties of objects and materials, properties and changes of properties in matter, chemical reactions and energy transfer, as they see how oxygen can be produced via the chemical reaction between yeast and hydrogen peroxide. Activity Overview: Students will watch a demonstration in which yeast and hydrogen peroxide are combined to produce pure oxygen. This will be confirmed by use of a glowing splint, a commonly used test for oxygen. Caution: This activity uses an open flame and as such, care should be taken to avoid an unwanted fire. This is especially true when it comes to disposing of the materials afterwards. Ensure that the wooden splint is thoroughly soaked in water before disposal to prevent re-ignition while in the waste receptacle. 1. Using the Background information provided, discuss the science behind greenhouse gases, global warming and how correct levels of both carbon dioxide and oxygen are vital to the health of our planet. 2. Explain that in this activity you will demonstrate how to produce pure oxygen using yeast and hydrogen peroxide. You may wish to explain that yeast is used in the making of bread and is responsible for creating all the little holes in each slice. 3. Place 2 teaspoons of yeast into a re-sealable bag and ensure the yeast falls to the bottom. airspace 6 MUSEUM IN A BOXPDF Image | Making Oxygen and Carbon Dioxide NASA
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