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| Description | To illustrate the diffusion of molecules across the cell membrane and the role concentration plays in the movement of water. This lab should be performed as an introduction to the cell unit (i.e., they should not already know about osmosis and diffusion). This lab is most applicable for an introductory biology course but could be
used at any grade level from 6-12. Students will need to be familiar with the idea of homeostasis. Upon completion of this activity, students will be able to: explain how diffusion happens using the term concentration gradient and state the exact cause of the volume change occurring in the egg.
This teaching resource was developed by a K-12 science teacher in the American Physiological Society’s 2007 Frontiers in Physiology Program. For more information on this program, please visit www.frontiersinphys.org. |
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| Type of Resource | Laboratory or Hands-On Activity | |||
| Format | Portable Document Format - PDF | |||
| Author |
Erin Odya, Warren Central High School
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| Development Date | August 1, 2007 | |||
| Grade/Age Levels |
Middle School (Grades 6-8) High School lower division (Grades 9-10) High School upper division (Grades 11-12) |
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| Pedagogies | ||||
| National Science Educational Standards |
Abilities necessary to do scientific inquiry (K-12), Change, constancy, and measurement (K-12), Evidence, models, and explanation (K-12), Nature of science (5-8), Regulation and behavior (5-8), Science as a human endeavor (K-12), Structure and function in living systems (5-8), The cell (9-12), Understandings about scientific inquiry (K-12) | |||
| Learning Time | 2-3 hours | |||
| Language | English | |||
| Type of Review | Reviewed By LifeSciTRC Board | |||
| Review Date | December 6, 2010 | |||
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| Suggested Use | ||||
This a well structured learning cycle inquiry version of huge classic egg diffusion/osmosis lab. The resource links are extensive and very helpful.
—Rachel Beattie, Lincoln-Way East High School
I agree with the other commenters! The only thing that I'd like to add is that the webquests require the students to determine how reliable they think the websites are... which is such a great skill for them to learn!
—Aubrey Mikos, Serena High School
This activity could be complimented with an on-line introduction (http://www.glencoe.com/sites/common_assets/science/virtual_labs/LS03/LS03.html) so that students can get to work on their ideas. A required lab experience for high school biology students.
—David Upegui, Central Fall High School
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Anyone who is learning to flip their classroom and add inquiry would benefit from this resource. It is complete with resources, links, worksheets and rubrics. I plan to use this resource this fall as I learn to have a more student-led classroom. Excellent resource.
—Cathia Acton, The Burlington School