Stalactites hang as icicles of different diameters and stalagmites hang from the floor of the caves.

Stalactites hang as icicles of different diameters and stalagmites rise up from the floor of the caves.

Stalactites rise up from the floor of the caves and stalagmites hang as icicles of different diameters.

Stalactites hang as icicles of different diameters and stalagmites also hang as icicles of different diameters.

Ecosystem -Biosphere - Community - Population

Population - Organism - Ecosystem - Biosphere

Organism - Community - Population - Biosphere

Organism - Population - Ecosystem - Biosphere

Upper and lower mantle

Crust and upper mantle

Crust and core

Mantle and core