Osmosis Demonstration
Purpose
This is a demonstration of osmosis. In this demo, there will be two groups of beans being tested: beans in room temperature water, and beans in boiling water.
Hypothesis
If osmosis allows water to pass through a semipermeable membrane, then I think that the beans, in both room temperature water and boiling water, will grow in size.
Materials
-dried black beans
-water
-pot
-small plastic container
Procedure
Put a small handful of dried beans in room temperature water. Leave overnight and observe changes.
In a pot of boiling water, put another small handful of dried beans in the water for 5 minutes and observe changes. Record results.
Results
Room temperature beans- grew 0 cm after 7 hours
- after 19 hours they grew 0.4 cm
Boiling Water beans- grew 0.2 cm after 5 minutes
Conclusion
Due to the process of osmosis, water was able to pass through the black beans' membrane, allowing them to grow in size. This supports my hypothesis. As shown by the results, the temperature of the water has a significant effect on the growth of the beans. The beans in boiling water were able to grow half the size of the beans in room temperature water in a fraction of the time. The process of osmosis was demonstrated by observing the growth of beans in water over a period of time.
If anyone else is interested in this topic, a question that arose from this demonstration is "why did the warmer water have a faster effect?"
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