Typically, pebbles - there's more empty space in a given volume for water to travel in, there's less density in the material to inhibit the flow of water, etc.
At least, that's what I see on a day to day basis. :)
Clay and silt.
It depends on the particle size of each but some clays such as bentonite are very highly absorbent. This is why it is used for cat litter and as a drilling fluid when drilling bore holes. Although sand may take up water quicker it does not have the capacity to hold on to it. You can see this effect on a beach when the tide goes out the sand soon becomes firm and then dry. Now contrast that with a muddy area which remains muddy for some time after the water has drained off..
working with clay
Most of the time, it's still called Clay. After it dries, it is/they are clay bricks.
Kaolin and ball clays were most often mined by directing hydraulic high-pressure jets of water on the clay faces of open pits, loosening the soft clay from the deposit.
Most pebbles will sink in water because they are denser than water. Some types of pebbles may have air pockets that allow them to float briefly before sinking.
Most people would keep goldfish in a bowl or tank, filled with water. You can always add scenery such as pebbles plants and castles :D
Water does not filter particles: it is the other way around. Pebbles, gravel, and sand are used to filter water, with the smallest particle size (sand) filtering the most particulates from the water, whether it is salt water or fresh water.
Pebbles in a stream are most likely eroded by the continuous flow of water, which exerts force on the surfaces of the pebbles. As water flows over and around them, it carries away small particles through abrasion and hydraulic action. Additionally, the movement of other sediment and debris can contribute to the wear and smoothing of the pebbles over time. This process is part of the natural cycle of erosion and sediment transport in river systems.
round
Sandy soil holds the least water, while clay soil holds the most water due to its small particle size and high water retention capacity. Loamy soil, which is a mix of sand, silt, and clay, is considered ideal for plant growth as it offers a good balance of drainage and water retention.
Clay soil absorbs the most water due to its small particle size and high water retention capacity. Sand has the lowest water retention, while silt and loam are intermediate in water absorption capabilities.
Shallow pools of water
Loam soil holds more water than clay soil. This is because loam soil is a mixture of sand, silt, and clay, which allows for better drainage and moisture retention compared to pure clay soil, which tends to compact and hold water tightly.
Clay soil is said to hold the most water. This is because the soil's particles are so small and there are numerous small soil spaces. Water moves slowly through. So there is great water retention.
Pebbles do not naturally glow in the dark. However, some pebbles are coated with a phosphorescent material that absorbs light and glows in the dark after being exposed to light.
soil that is made up of about equal parts of clay, sand, and silt is called loam. it has a crumbly texture that holds both air and water. loam is best for growing most types of plants.