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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
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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.
!
