rock
Diamond is the earths hardest material.
Tracks form circles on the surface of a hard disk
Constructive Force
volcanoes change the earths surface due to the lava set hard and drys which can make the surface bobbly and ruff also it makes the land more fertilekill people
because its hard to breathe thin air above earths surface, the higher you go its hard to breathe oxygen.
Cell Membrane
track
volcanoes change the earths surface due to the lava set hard and drys which can make the surface bobbly and ruff also it makes the land more fertilekill people
the hard fibrous material that forms the main substance of the trunk or branches of a tree or shrub
Only a hard outer surface. Whatever the piece is less difficult to penetrate.
Saturn is a gas giant, and does not have a surface to speak of.
Mars' surface is rocky and rugged, similar to some desert landscapes on Earth. It is covered with a layer of regolith, which is a combination of dust and rocky material. The surface can be challenging to navigate due to its uneven terrain and occasional dust storms.