1. Draw a colored sketch of your submarine model in the floating, sinking or neutrally buoyant position. Take a photo of your sketch and insert the photo below the title of your blog entry. You could also do your drawing use a digital drawing tool if you like.
2. Part of the design process, is to think of design ideas to try and then test to see how those design ideas actually work.
- Describe any design ideas that you had which did not work as expected.
- Describe any design ideas that you had which did work as expected.
Quite a few ideas didn't work. We thought putting a lot of weights might do the trick, but then it was impossible to get the submarine to float. We put weights in different places, but that restricted the bottle to stay still and balance. We also thought of adding balloons, hopefully helping the bottle to float, but that didn't make any difference. At most, the problem was to get the bottle to float after it had sunk.
Some ideas did work too, getting us a step further from reaching our goal. Putting weights on one side of the bottle helped the bottle sink horizontally. Blowing air in the tube we attached to a hole (made by the Bunsen Burner) helped the bottle float. It was important to keep weight and air balanced so that we could succeed.
3.
Both the bottle, and a normal submarine include weight and air as controls.
They both have a sinking and floating as elements, and have ways to be controlled.
While in order to float we used a pipe, and shoved in a hole. Then we blew in the pipe, causing the submarine to float. For a real submarine though, people won't just make a hole, and blow in a pipe. Blowing in the pipe was just for the bottle submarine to float.
The bottle submarine needed weight in order to sink. A real submarine wouldn't need any weights since it's quite heavy itself.
4. Did you ever feel like you were not going to be able to successfully modify the plastic bottle to make it dive and float like a submarine? If you did not give up, what strategies helped you persevere and keep going?
At one point it was a bit frustrating. None of the methods or strategies were working, and it had become confusing as to what the real problem was. We started again and again, thinking of new placement styles for the components. We tried going through steps and weight comparisons step by step. We figured adding weight (metal rings) on the outside would prevent movement, resulting in an equal balance between air and weight.
While in order to float we used a pipe, and shoved in a hole. Then we blew in the pipe, causing the submarine to float. For a real submarine though, people won't just make a hole, and blow in a pipe. Blowing in the pipe was just for the bottle submarine to float.
The bottle submarine needed weight in order to sink. A real submarine wouldn't need any weights since it's quite heavy itself.
4. Did you ever feel like you were not going to be able to successfully modify the plastic bottle to make it dive and float like a submarine? If you did not give up, what strategies helped you persevere and keep going?
At one point it was a bit frustrating. None of the methods or strategies were working, and it had become confusing as to what the real problem was. We started again and again, thinking of new placement styles for the components. We tried going through steps and weight comparisons step by step. We figured adding weight (metal rings) on the outside would prevent movement, resulting in an equal balance between air and weight.
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