As part of our exploration of liquids in science we performed an experiment using water, cooking oil, and salt. We combined water and cooking oil in the same container, observed how they settled, then talked about the weight of liquids. We then took turns dropping salt into the settled mixture, observed, and wrote about what we saw. Students noticed:
These observations led us to talk about the salt being coated in oil as it passed through this layer. As the salt passed through the water then settled on the bottom of the container, we noticed the air bubbles often contained oil that was rising above the water as cooking oil is lighter than water.
We were able to use this experiment to practice documenting our work as scientists. We wrote about materials we used, created a hypothesis, wrote down observations, and completed a conclusion after comparing our results to our hypothesis. Students demonstrated their skills and really enjoyed learning more about one of our most important materials, water. - Ms. Bates' Class Comments are closed.
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June 2017
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