Today in class, after learning the basics of matter, we did a lab to learn more. We mixed cornstarch and water, creating a sort of liquid, sort of solid goop called "Oobleck." What would lead you to consider Oobleck to be a solid? a liquid? Because of how it looked when the water was mixed in, I started by assuming it was a liquid. When I first dug my hand in to grab it, however, it felt hard, and dry. I thought perhaps it was a solid. If I squeezed some in my hand, it would harden. But if I opened up my hand and left it alone, it would drip through my fingers as if it were a liquid. To try an understand it more deeply, I tried rolling it into a ball, throwing it in the air, and from hand to hand, dropped it on the table, and smacked it with my hand. What was the purpose to this lab exercise? As we start to dip our toes into chemistry, we have learned about matter. This exercise was to make us question matter, and the basic phases. It was also a fun way to practice our newly learned lab safety rules. What happened? What did you learn? Is it a solid or liquid? When applying pressure to the oobleck, it hardened and would break. When letting it sit, it would become more of a goop, and slide through fingers or across a table. I learned how to have fun while complying with safety rules. In my opinion, this is a liquid. However, it has extra molecules. |
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AuthorThis blog has post's of all the cool projects I've done in chemistry class. Archives
December 2015
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