我們用白板筆畫的小魚居然動起來了！
原來這個「魔法」的原理是這樣：白板筆的墨水，含有不溶於水的樹脂、顏料、酒精、脫模劑等原料。我們用白板筆在瓷盤畫上小魚，讓酒精揮發後，加入水。水分子和盤子之間的引力，讓水分子滲透到含有樹脂的筆跡跟盤子之間，密度小於水的白板筆小魚就浮起來了。
實驗過程中，教室裡充滿了此起彼落的驚呼聲。原來我們的生活中，充滿了這麼多有趣的科學現象。
科學實驗真是太神奇、太有趣了！
The fish we draw with the whiteboard marker is moving!
Here is the principle behind the "magic": the ink of the whiteboard marker contains ingredients insoluble in water including resin, painting, alcohol, and release agent. We draw fish on the porcelain plate, volatile the alcohol, and add in water. The gravity between the water and the plate makes the water sink under the mark containing resin. Consequently, the fish floats on the water.
The classroom is filled with cries of awe during the experiment. There are so many interesting scientific phenomena in our daily life.
Science experiments are so amazing and interesting!