Osmosis Lab—Investigating Diffusion and Osmosis w/ Potatoes—Video & Written Inst

Supporting document included
This is an additional download that supports the video.
Students use slices of potatoes to investigate Osmosis: the movement of water into and out of the cells of the potato. This lab focuses on making careful observations and collecting data such as weight and length. Students use a control to study changes caused during the experiment .

By starting with the scientific phenomena, you'll be intrigued and excited to dig deeper into the why’s and how’s of each scientific concept. Beautifully illustrated and well laid out, these lab activities are easy to use from the very first page. Experiments are clearly organized and written to the student so they do not need to be pre-digested by a teacher before beginning. Helpful tips throughout the experiments and the Teacher Notes leave the reader in no doubt about how to perform or understand an experiment. Designed for students and optimized for teachers, these labs will engage and fascinate students. Scaffolded writing prompts allow students of different abilities to engage with the same content. Both the teacher and the student are addressed so no additional books are needed. Engaging Science Labs are useful for classroom or homeschool environments.

Concepts Addressed
• Osmosis is the movement of water through a semipermeable membrane from a less concentrated solution to a higher one.
• Not every substance can cross a partially permeable membrane.
• When there is net flow of water into or out of a cell, its turgor pressure changes.
• Water and other substances, get into and out of cells through osmosis and diffusion.

Click here to see companion curricular pieces:
Diffusion Lab—Investigating Diffusion at different temps—Video & Written Instr
Diffusion Game—Molecular Motion & Change of State—Video & Written Inst.
Osmosis Lab—Investigating Osmosis and Diffusion Using Deshelled Eggs
Diffusion Lab—Molecular Motion and Change of State Video & Written Instruction

Materials Needed
Potatoes, Knife, Salt, Cups or small dishes, Water, spoon or stirrer, Scale, Iodine (optional)

Answer Key
Extensive teacher notes address the many questions that come up. You shouldn’t have to do outside research on this topic unless you want to.

Time Required
This lab takes about 30 mins, but with extensions can take longer.

Student Sheets
• Scaffolded writing prompts & lab reporting

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