3d
background
center
cleaving
composition
core
country
cross
crust
detail
earth
education
environment
geography
geologic
geology
globe
heat
hot
illustration
inner
inside
interior
internal
iron
lava
layer
lithosphere
magma
mantle
map
model
molten
nature
nucleus
outer
part
planet
research
schematic
science
section
solid
space
sphere
structure
study
temperature
volcanic