Rocket science isn't easy, but these smart students are able to build their own water rockets, using simple materials and physics. First they fill the bottle with a bit of water, and then they pump air inside to build pressure. Finally they get to press the launch button. 3, 2, 1, LIFTOFF!
火箭科學並不容易，但這些聰明的學生能夠用簡單的材料和物理知識製作自己的水火箭。他們先在瓶子裡裝入一些水，接著打入空氣來增加壓力，最後按下發射按鈕。3, 2, 1，發射！
Teacher 徐啓瑞 / Edwin Schadewald 製作