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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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- Spring '11
- wax paper, Magnifying glass