This threedimensional demonstration model presents submarine topography and the internal structure of the Earth in a clear, durable format suitable for secondary school teaching and educational displays. Key benefits Makes complex geology easy to understand: visually demonstrates crustal structure, inner layers of the Earth, topographical changes, plate tectonics, and the formation and distribution of volcanic earthquakes. Improves classroom engagement and retention: a handson, 3D reference replaces abstract diagrams and helps students visualize spatial relationships. Durable and lightweight for repeated use: made from synthetic resin that is firm and resistant to deformation while remaining easy to move and position. Main features Function: Demonstration of tectonic elements and processes, including sea floor features, mountain formations, and layered Earth structure. Material: Synthetic resin, chosen for stability, light weight, and longterm dimensional accuracy. Size: Length 45 cm, width 22 cm, height 12 cm. Classroom friendly size for tabletop demonstrations and small group work. Performance: Stable model that holds detail for repeated handling and clear display of topographical and structural changes. Typical use scenarios Classroom lecture: Use during a geography or earth science lesson to illustrate plate boundaries, subduction zones, midocean ridges, and how tectonic movement leads to earthquakes and volcanic activity. Lab or group activity: Place on a table for small groups to examine and discuss crustal layers, seafloor morphology, and mountain building processes. Educational display or workshop: Use in school exhibitions, teacher workshops, or museum education corners to provide an intuitive reference for visitors and students. Suitability Designed as an intuitive teaching aid for secondary schools and educational programs focused on geological structure evolution and topographical change. Suitable for teachers, instructors, and education coordinators seeking a practical, durable model for demonstrations and student interaction. This model provides a practical, classroomready tool to clarify geological concepts and enhance handson learning.