In this lab, your students will be able to explore the importance of glucose as an energy source. Students will use glucose and splenda as reactants for yeast to use during cellular respiration. The lab can be changed to include other sweeteners as well, such as fructose, sucrose or lactose. Students will combine yeast and the sweeteners with water in test tubes and fit the top of the test tubes with balloons. As the yeast due cellular respiration, the balloons inflate! Students can watch an invisible reaction happen before their eyes.
I find this lab helps students understand the relationship between reactants and products, as well as visualizing the products of cellular respiration. It also is a great introduction into human health and why sugars are important to us. It also explains why "diet" foods and drinks don't contain calories!
This lab includes pre-lab reading and questions, which are excellent if students come in late, or miss a day in lab. It gives an overview of the topic if they missed class as well as explains the importance and purpose of the lab.
The lab includes clear, easy to follow directions, a results section for students to record their data and space to graph with scaffolding. There is space for a full lab report, including introduction, materials, methods, results summary and conclusion sections with sentence starters for scaffolding. Sentence starters can be removed to differentiate instruction.
This lab includes everything you need to teach your students about cellular respiration with easy, cheap materials you can buy at the grocery store. This lesson will provide at least three days of instruction for one hour classes.