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- Author:
-
Mary R. Hebrank
- Subject:
- Mathematics and Statistics, Science and Technology
- Institution Name:
- Engineering K-Ph.D. Program, Duke University
- Collection:
-
TeachEngineering
- Grade Level:
- Secondary
- Abstract:
Students set up a simple way to indirectly observe and quantify the amount of respiration occurring in yeast-molasses cultures. Each student adds a small amount of baking yeast to a test tube filled with diluted molasses. A second, smaller test tube is then placed upside-down inside the solution. As the yeast cells respire, the carbon dioxide they produce is trapped inside the inverted test tube, producing a growing bubble of gas that is easily observed and measured. Students are presented with the procedure for designing an effective experiment; they learn to think critically about experimental results and indirect observations of experimental events.
- Languages:
- English
- Material Type:
- Activities and Labs, Lesson Plans
- Media Format:
- Graphics/Photos, Text/HTML
- Conditions of Use:
-
Read the fine print
Resources may be used on a nonprofit, non-commercial basis by educators, without any fee or cost to access, link to and use, or in any manner alter, revise, copy, edit, translate or digitize.
- Copyright Holder:
- Duke University
No restrictions on your remixing, redistributing, or making derivative works.
Give credit to the author, as required.
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Your redistributing comes with some restrictions. Do not remix or make
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Copyrighted materials, available under Fair Use and the TEACH Act for US-based
educators, or other custom arrangements. Go to the resource provider to see
their individual restrictions.
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