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首先将供给仪器抄在黑板上(或课前用小黑板先抄好),如:刻度尺、天平、弹簧秤、量筒、烧杯、金属块、细线、足量的水。然后让学生根据所学的知识,利用这些仪器设计五个以上可测出未知液体密度的实验方案。 1.利用常规方法测 (仪器:天平、烧杯、量筒) (1)用天平测出烧杯的质量m。(2)将未知液体倒入烧杯中,并测出烧杯和未知液体的质量m(3)用量筒量出烧杯中未知液体的体积v
First copy the supply instrument on the blackboard (or use a small blackboard before class to copy it), such as: scale, balance, spring scale, measuring cylinder, beaker, metal block, thin line, sufficient amount of water. Students are then allowed to use these instruments to design more than five experimental solutions that can measure the density of unknown fluids based on what they have learned. 1. Measured using conventional methods (instrument: balance, beaker, graduated cylinder) (1) Measure the mass m of the beaker with the balance. (2) Pour the unknown liquid into the beaker and measure the mass of the beaker and the unknown liquid m (3) The measuring cylinder measures the volume of the unknown liquid in the beaker. v