一、吹气球实验材料:小气球一个,粗细相同的直玻璃管(10cm长)和弯管(20cm长)各一根,玻璃瓶(带胶塞)一个,橡胶管一根,抽气机一台。实验方法:在胶塞上打两个与玻璃管粗细相同的小孔,把小气球套在直玻璃管的一端,另一端穿过胶塞上的小孔,弯管也要通过胶塞上的小孔插入玻璃瓶内,盖好胶塞,用胶固定。把橡 First, the balloon experiment material: a small balloon, the same thickness of the straight glass tube (10cm long) and the elbow (20cm long) one each, a glass bottle (with rubber stopper), a rubber tube, a suction machine station. Experimental method: two holes on the rubber stopper and the same thickness of the glass tube, the small balloon set at one end of the straight glass tube, the other end through the hole in the rubber stopper, elbow also through the rubber stopper Insert the small hole into the glass bottle, cover the rubber stopper, and fix it with glue. Put the rubber