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It was once again the science festival of our school. This time what the year sevens are doing is about water rockets.

Water rocket is simply made of a 1.5L bottle, and then pour 200~400ml of water in to the bottle, use the air pump to give air pressure to the bottle, release the bottle and because of the action and reaction, the bottle would fly all the way up to the sky.

Making a water rocket is pretty simple; you just buy a big bottle and add things that would decrease the air resistance, like wings that could keep the balance and make the head of the bottle sharper. There are a lot of classmates who entered the competition; they did a lot of improvements during the test flight before the real competition started.

For example, I made a really pretty rocket too, full of cool colors and drawings on it, but the rocket I made, its head was too light so it wasn’t balanced. So I added some coins on the top of the rocket and it seemed to be much better.

Day after day, the science festival finally came and all the MYP-7 students went to the north campus in the afternoon. Sitting on the ground, we saw a lot of bilingual class students sitting there or flying their water rockets, all of them added parachutes on the rocket and I don’t think it worked a lot and because of the parachute, the air resistance become bigger so their rockets flying height is very low. And also, the wind is quite strong that day; it’s also a reason why the parachutes didn’t work.

After several minutes, it was us who were doing the experiment, and I think most of us did a pretty good job because our rockets flew higher than any student in the other campus. One of the students from MYP-7.2, I have to admit he did an excellent job, his rocket was the highest of all and he broke the record of the past student’s highest height. But unfortunately, his rocket was out of bounds and these kinds of rockets don’t count, or else he would have already broken the record.

During this festival, I think all of us learned a lot about how to make water rockets better and better, and I’ll definitely attend the next science festival regardless of what the subject is.

                                                   ---Amy Dong

                                                       MYP-7.1