Photo caption: In Jillian Stellato’s eighth-grade science class, students Sophia Perri and Evie Berkoski demonstrate perfect results from their yeast cell respiration lab. The lab involves mixing yeast with sugar in a warm water solution and observing the production of carbon dioxide gas. Students then place a balloon over the container to measure how much the yeast cells undergo cellular respiration. This experiment allows students to visually see the process of converting sugar into energy with carbon dioxide as a byproduct.