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WS_Science By You Activity_Diffusion of Cell Size_Final

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+ ward ' s science Page 1 Diffusion and Cell Size Lab Submitted by: Lisa F. Recommended Grade Level(s): Appropriate for: Grades 9–10 Time Requirements: Prep Time: 10 minutes Activity Time: 45 minutes Teaching Topics & Concepts: Observe the process of diffusion by watching the color change in model cells as this process occurs. Discuss how cell size influences the rates of diffusion. National Science Standards Alignment NGSS-HS-LS1- 2. Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms. Materials: • Ward's® Prepared Agar Cubes • Plastic knives • Plastic cups or glass beakers • Distilled White Vinegar • Rulers • Timers This content is being brought to you by the Ward's World, Science By You program. This program brings lesson and classroom activity ideas directly from science teachers around the nation right to you. From best practices to activities, Science by You offers inspiration for every subject and every grade level. Interested in sharing your own content? Learn how today. PMS200 Black 70% Cool Gray 10 Black Astra Regular get for free from dafont.com Safety • Wear safety glasses, gloves, and a lab apron. • Do not eat the agar cubes. • /!\ Agar cubes contain Phenolphthalein (C), which is known to the state of California to cause cancer. For more information, go to www.P65Warnings.ca.gov. • Agar cubes need to be stored in the refrigerator upon delivery. !

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