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.
as the sea washes over them they are bashed and rubbed against each another.
The saltwater eats at the rock and when it finally washes up on the shore, it's smooth
The Sea of Tranquility is a bare smooth dusty area on Earth's Moon.
The form of beach stones is a result of weathering out of the rock from which the stone originated and abrasion by the sea. Sea abrasion will then to make the stone roundish and smooth, thus if there is a hole in it, it is either the result of the weathering process before the stone got to the sea or a shape inherent to the rock from the start. For instance in England, many beaches are made of flint pebbles where the flint comes form the eroded chalk cliffs. The flint in the chalk is irregular in shape and naturally has holes in it due to how it formed in the rock. Thus many pebbles will have depressions and holes in them when you find them on the beach. The other possible origin for holes in pebbles (made of limestone) is the action of certain marine worms which secret acid to bore holes in rocks so that they have a home to live in. This too could be a possible reason for beach stones with holes but only if the stones are made of limestone.
Sea water and fresh water does not have the same density because sea water has salt, which makes it more dense than fresh water Sea water and fresh water does not have the same density because sea water has salt, which makes it more dense than fresh water
No. Freshwater does not have the same amount of dissolved materials as sea water. Sea water has a much greater amount of salt dissolved in it.
Sea water is a complex solution.
Beach = sand, pebbles etc. Sea = water.
The sea can be destructive by splashing water, pebbles, sand, mud and seashells to the tide. It can also pull soft rocks out to sea.
The residue on the pebbles is not just salt. It contains very many elements that go into sea water. The pH will be effected (raised) if sufficient sea salt is added.
which scientist said"a child picking pebbles on the sea-shore"
sand, pebbles, rocks,debris, hit land, glacier, water, soil, and sea
There is no special name for a curved sea wall. These sea walls are simply labeled as curved and serve the purpose of reflecting a waves energy back to the sea.
the curved sea wall deflects waves from getting onto shore
sand, pebbles, rocks,debris, hit land, glacier, water, soil, and sea
smooth
Sea with no waves.
A level line is based on altitude. Altitude is the distance from sea level. Sea level is curved to the shape of the earth so a level line must be curved.
Certainly, but smooth water reflects better than turbulent water.