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本知识板块以物质为主线,对物质特性的研究层层深入.从宇宙的物质性和微观粒子的物质性,到用质量表示物体所含物质的多少,最后在实验探究的基础上研究物质的特性之一——密度.
This knowledge section takes material as the main line, and conducts in-depth research on the characteristics of matter. From the materiality of the universe and the materiality of microscopic particles to the use of quality to indicate how much material the object contains, we finally study the matter on the basis of experimental inquiry. One of the characteristics - density.