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实验材料:软塑料瓶、粗塑料吸管、细塑料吸管、胶条、橡皮泥、三角形纸片。实验步骤:1.在软塑料瓶的瓶盖上穿一个孔。2.将细塑料吸管插进瓶盖上的孔里,用胶条将接口处密封住。3.将粗塑料吸管做成一枚10厘米长的“火箭”。4.将三角形纸片贴在粗塑料吸管上,当作平衡器。5.用橡皮泥捏一个箭头。6.在粗塑料吸管的管口末梢插上橡皮箭头。7.把细塑料吸管插入粗塑料吸管中。8.使劲挤一下塑料瓶,你会发现“火箭”飞出去了。实验揭秘:
Experimental materials: soft plastic bottles, rough plastic pipette, fine plastic pipette, tape, plasticine, triangular paper. Experimental steps: 1. Put a hole in the bottle cap of soft plastic bottle. 2. Insert the thin plastic pipette into the hole in the bottle cap and seal it with the adhesive tape. 3. The rough plastic straw into a 10 cm long “rocket.” 4. The triangular paper attached to the rough plastic pipe, as a balancer. 5. Pinch an arrow with plasticine. 6. Insert the rubber arrow in the nozzle end of the coarse plastic pipette. 7. Insert a thin plastic pipette into the thick plastic pipette. 8 squeeze the plastic bottle, you will find “rocket” fly out. Experimental Secret: