1皮碗实验皮碗2个、玻璃1块,把两个皮碗对压在一起,排出内部气体并往外拉,感觉费力,说明有大气压存在。另外,把两个皮碗压在玻璃上并往上提,可把玻璃提起。2纸片托水在杯中装满水,用硬纸片把杯口盖严,轻轻倒置或斜置,纸片均不脱落,说明大气向各个方向都有压强。3瓶吸水球在小气 1 Leather bowl 2 test cups, 1 glass, and the two cups pressing together, exhausting the internal gas and pulling it out, it feels laborious, indicating that atmospheric pressure exists. In addition, the glass can be lifted by pressing the two cups against the glass and lifting them upwards. 2 Fill the paper with water in the cup. Fill the cup with hard paper and gently invert or tilt it. The paper does not come off, indicating that the atmosphere has pressure in all directions. 3 bottles of absorbent balls in the air