Soil Specimens 18pcs

Refined petroleum products are derived from crude oils through processes such as catalytic cracking and fractional distillation. Gasoline / Kerosene / Lubricant / Asphalt / Aviation Oil / Diesel / Paraffin

Model Size: 45*21*13cm This product is mainly used in the teaching of geography teaching in middle school to teach the change of terrain and geological structure; the phenomenon of fold structure and its topography is far from the actual life of students, and it is difficult to conduct actual observation because of its large spatial span and long change time. The students are difficult to understand.

Model Size: 44*24*12cm This product is mainly used in the teaching of secondary school geography to teach the seabed topography, the inner circle of the earth, the crustal structure, the topographical changes, the tectonics theory, the formation and distribution of volcanic earthquakes, and the formation of the earth's surface sea and land corridor. These contents are interrelated and cause and effect. For middle school students, it is often difficult to analyze and understand this, and because of its large spatial span and long change time, which is impossible to conduct actual observations, abstract and difficult to understand.