Chemistry
Today, we learned two new things in class. First, we learned how to make our own floating lanterns. We used thin pieces of balsa wood, five birthday candles, and a garbage bag. We first melted the candles onto the wood, then we taped the wood to each other to the bag. Finally, we lit the candles and waited for the smoke to pile up together to fill the bag up, so it would float. You could see the bag was expanding and inflating within minutes, which we then let go and let it float. We also learned three different properties of matter. The first one was density, which is the measurement of an object using mass and volume. Density is used to tell if boats or other things are able to float in water, or just sink to the bottom. For an example: if you put a toy boat and a brick in a bathtub to see which one would float, the boat would easily stay up because it is lighter than water. Other one was buoyancy, which is an easier way to tell if certain solids, liquids, and even gases can float in water or not. For an example: a boat floating in water. And finally pressure, which is the force applied by different objects. Pressure is used when you or something apply force to other object. For an example: if you want to cut a banana with a knife, you would apply a small amount of force.
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November 2016
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