Why is bread usually soft and airy? Experiment to see how yeast uses cellular respiration and is affected by sugar!
Learning Objectives
Cellular respiration
Chemical reactions
Sugar is needed for cellular respiration to occur.
The sugar is rearranged with oxygen to produce energy in addition to water and carbon dioxide.
Conduct an experiment to determine the effect of sugar on yeast’s ability to respire
Use a model to show to explain that molecules are broken apart and rearranged to form energy
Standards Alignment + Connections
MS-LS1-7: Develop a model to describe how food is rearranged through chemical reactions forming new molecules that support growth and/or release energy as this matter moves through an organism.
This activity will address how exercise affects the rate of cellular respiration using three different indicators: breathing rate, heart rate, and carbon dioxide production.