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Fuel for Living Things

Author(s): Nancy P. Moreno, PhD, Barbara Z. Tharp, MS, and Judith Dresden, MS.

Food for Living Organisms

To focus student’s attention, begin by asking, Did you know that yeast is a living thing? Remind students that food provides the energy living organisms need to grow and reproduce. Ask, Is carbon dioxide released when living organisms use food? How is carbon dioxide released? 

Tell students that when organisms consume food, the food is broken down to release energy and produce critical building blocks for other molecules. During this process, oxygen is consumed and some carbon is given off as carbon dioxide. Inform students that they will conduct an experiment to observe how yeast cells release carbon dioxide gas. 


Funded by the following grant(s)

National Institute of Environmental Health Sciences, NIH

National Institute of Environmental Health Sciences, NIH

My Health My World: National Dissemination
Grant Number: 5R25ES009259
The Environment as a Context for Opportunities in Schools
Grant Number: 5R25ES010698, R25ES06932


Houston Endowment Inc.

Foundations for the Future: Capitalizing on Technology to Promote Equity, Access and Quality in Elementary Science Education