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Investigating Osmosis and Diffusion

Kit #22
Investigating Osmosis and Diffusion

This kit stimulates students' curiosity, model an important characteristic of cells, provide a hands-on experience, and develop good laboratory technique. In this activity, students test for the presence of starch and glucose and then use these tests to observe that some molecules can pass through a membrane while others can not. In conclusion, they are asked to propose a reason for why some substances diffuse through the membrane while others do not.

Details at a Glance

  • 1-2 Days | 1-2 ~50 minute class periods
  • 1 Activity
  • Accommodates 1 class, with 12 groups of 2 students
  • Consumables service 24 students
  • Meets our criteria for supporting literacy
  • Includes digital resources

Complete Kit Equipment Package

Investigating Osmosis and Diffusion

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Scientific Concepts

•Models can be used to represent systems and their interactions.
•Cells have particular structures that underlie their functions. Every cell is surrounded by a membrane
that separated it from the outside world.
•All organisms must be able to obtain and use resources, grow, reproduce, and maintain stable
internal conditions while living in a constantly changing external environment.
•All organisms are composed of cells – the fundamental unit of life.
•Cells carry out the many functions needed to sustain life.

Guides & Student Sheets

Our kits and modules provide you with everything you need so you can open, review, and teach the material confidently the next day.

  • Full downloadable Teacher Guide with background information, detailed instruction, example data and answers
  • Downloadable Student Sheets with age appropriate background information, full procedure(s), and analysis questions
  • All materials necessary to carry out the investigation
  • Safety Data Sheets

Kit Components

  • 36 Glucose testing strips
  • 12 Membranes, semi-permeable
  • 12 Cups, plastic
  • 3 Droppers
  • 3 Lugol’s solution, bottle
  • 2 Glucose solution, bottle
  • 2 Liquid Starch, bottle
  • 1 Teacher’s Guide with MSDS
  • 28 Student Worksheets and Guides
  • Not included and needed for instruction: Coffee filter. 

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