Purpose: To show that living organisms perform respiration, and in doing so, take in oxygen and give off carbon dioxide.
Students will use phenol red, an acid/base indicator, to show that acids are produced as a result of the carbon dioxide released during respiration. Limewater (calcium hydroxide) is used as a definitive test for the presence of carbon dioxide.
Search words: cellular respiration, acid base indicators, lab lesson plan, carbon dioxide, gas exchange, living and nonliving characteristics.
Materials: Glass Beads, 13 test tubes, Phenol Red Indicator, Boiled yeast solution, Unboiled yeast solution, Dry seeds, Sprouted seeds, Cork or stopper to fit test tubes, Calcium hydroxide, Hydrochloric acid, Carbonated water, Drinking Straws
Note: This product is also contained in a complete bundled unit plan and can be viewed here: Cellular Respiration Complete Bundled Unit Plan
Your download will include a lab that is ready to be copied and passed out to your students. It will include Title, Purpose, Materials List, Safety Precautions, Procedure, Follow Up Questions, Student Data Sheets and Teacher Preparation Notes.
You can choose to have your students write their own lab report, or you can have them use the included Student Data Sheets to record their data and answers. You will receive both an editable Word document as well as a pdf form of the lab.
All answers are included. Please let me know if you have any questions. Thanks for looking!
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