نوع مقاله : مقاله پژوهشی
عنوان مقاله English
نویسنده English
The inner layers of the earth are the same as the inner parts of a peach. The deeper layers are denser and are often separated from each other by sharp sections. There are three types of large divisions. 1) Shell 2) Coating 3) Dense core, which is likely to be of iron or nickel (Figure 3-5). As we have expressed before, there is a shell, brain and holes on the surface of the earth.
