A conglomerate.
Most small pebbles are the remains of older larger pebbles, and even larger rocks many millions of years old. They became smaller and smaller through natural erosion processes (such as wind and water.) These processes affect all parts of the pebble equally (the pebble, whether it is on land or in the water, is constantly being tumbled around.) This constant erosion on all sides ends up making it smooth and round, much in the same way that rubbing sand paper across wood makes that side of it smooth. The erosion sort of "cleans up" any jagged irregularities of the pebble.
Mudstone is a type of sedimentary rock that is composed primarily of fine-grained mud or clay particles. It forms in low-energy environments such as lakes, swamps, and deep marine basins. Mudstone is characterized by its ability to break into thin, flat layers and its dull, smooth texture.
Slate is metamorphosed shale. Shale is a sedimentary rock that is composed of fine particles of clay minerals and mud that were transported and sorted by water. The color is a product of the type of clay and mud being transported and the time of its deposition.
not quite. The moon circles the Earth, which circles the sun. So the moon's orbit around the sun isn't a smooth track, but consist of a wave like pattern.
Um, well... obviously a sandy beach :D
Beach pebbles are smooth as they are eroded by the waves
Limestone is not made of pebbles, it is made of animal remains.
Pebbles can be used for scenery around a garden or a pond. Pebbles are usually smooth river rocks. You can go buy them at Home Depot.
myocytes
Pebbles are most often found near rivers and lakes. These stones are usually tumbled in fresh water until their edges are smooth.
igneous is black and smooth metamorphic is magnetic and sedimentary is used as cement
the look and feel of sedimentary rocks are sometimes hard and smooth or hard and rough
Smooth muscle.
smooth or in some cases bumpy
Over time, the sand and water at a beach both work together like a sandpaper to smooth out the surface of these pebbles.
Goliath had three brothers, that is why David took four smooth pebbles.
Through weathering, typically from abrasion or tumbling.