Ключевые слова: cross, crosssection, crossview, earth, earthcore, earthinterior, earthlayers, earthscience, earthstructure, earthstudy, ecosystem, educational, environment, environmentstudy, formation, geological, geologyconcept, geologyeducation, geologylayers, geologyresearch, innerlayers, landscape, landscapeview, layers, layerstudy, lithosphere, mountain, naturalworld, nature, research, rock, science, scientific, section, soil, stratification, study, subterranean, terrain, terrestrial, underground, volcanic,