Volcanic blocks
Volcanic blocks
A'a' pronounced ah ah
ʻAʻā lava - (the word is Hawaiian and means "stony rough lava").
Most glass is shiny but can be made to look dull.
The rough endoplasmic reticulum has ribosomes on its surface. This is what make is "rough"
Smooth surface
Its surface is rough because of all the rock's and crater's in its surface.
The rough surface is better than the smooth surface for the frictional force to act.
The Rough Endoplasmic Reticulum (Rough ER) has ribosomes on its surface.
abrasive means to smooth out a rough surface
The moon's surface is rough - due to numerous impacts from meteorites
when light hits a rough surface it scattters.