This week we were given a challenge: To make boats using recycled materials that would hold weight. The first thing we needed to do was test the different materials to see how they would react in water. Through this experiment, we discovered that materials: - absorb (soak up) water - dissolve (become one with the water so that we can not get it out of the water) in water - disintegrate (break into little pieces) in the water - are water proof (does not soak up any water) We found out that ...We tested a sponge and discovered that when the bottom of it got wet, it soaked up (absorbed) water and would flip so the dry side would stick out of the water. When we tested the tin foil, we found out that the shape made difference. If you put the tin foil in the water flat, would float below the surface of the water. If you rolled it into a ball, it would sink. However, if you curved the edges, it would carry some weight. Another material we tested was a milk carton. We learned that an empty milk carton would float. But if we put water inside the milk carton, it would get lower and lower in the water until it touched the bottom. We also remembered things like if you put heavier objects on lights things, it would float. Stay tuned for next week when we start to build our boats!
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AuthorEveryone in the grade 2 class at Langevin Science School. Archives
February 2017
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