【提出问题】学习了固体和液体质量的测量,小盼和小汉在思考一个问题:我们一时一刻也离不开空气,常见的空气有没有质量呢?【猜想与假设】1.空气没有质量。2.空气也应该有质量,但质量不会太大。【设计方案】空气的质量应该很小,不好直接用天平测量。而且我们处在空气的包围中,周围的空气会对我们的测量造成影响。如何处理好这两个问题是我们测量的关键,应该动动脑筋。 【Ask a Question】 Learning the measurement of solid and liquid quality, Xiao Pan and Xiao Han are thinking about a problem: we can not do without air for a while, and what is the common air quality? Conjecture and Assumption 1. The air is of no quality. 2. The air should also have quality, but not too much quality. [Design] The quality of the air should be small, not directly measured with a balance. And we are surrounded by air, the surrounding air will affect our measurement. How to deal with these two issues is the key to our measurement, we should use our brains.