Journal 11 - I prepared two small cups of water for each...

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Meserat Zemui AESC 4920S November 21, 2010 Journal 11 As my last lesson this week I had the opportunity to do an experiment which taught the students about the difference between dissolving and mixing using sand and salt. First the students put a pinch of salt on a piece of wax paper. They used a magnifying glass to observe the properties of salt. Then they put a pinch of sand on a piece of wax paper. They also used the magnifying glass to observe the properties of sand and the difference between sand and salt. I allowed them time to discuss their findings. Then they put a droplet of water on a piece of wax paper using a pipette and observed its properties. I also allowed them time to discuss the different properties of water.
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Unformatted text preview: I prepared two small cups of water for each student. The students then put the pinch of salt in one cup of water and the pinch of sand in the other cup of water. Then the students stirred both cups of water. I allowed them to discuss their findings. They observed that salt dissolves or disappears but sand does not. So they learned that all substances that combine do not dissolve. This was a good experiment because during previous experiments involving sand they thought that the sand dissolved in water. Using this experiment they learned that sand actually does not dissolve or disappear but that it actually just mixes. It also helped them to determine the difference between dissolve and mix....
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This note was uploaded on 03/28/2011 for the course AESC 4920 taught by Professor Berle during the Spring '11 term at University of Georgia Athens.

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Journal 11 - I prepared two small cups of water for each...

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