GEOLOGY

Detailed explanation-1: -Remember, the larger the particle size the greater the permeability. Since sand grains are bigger than silt sediments sand grains is more permeable. Porosity means open space thus a rock with high porosity will have a large percentage of space between particles.

Detailed explanation-2: -Soils with sandy textures have large pore spaces that allow rainfall to drain very quickly through the soil. Sandy soils are known to have high permeability, which results in high infiltration rates and good drainage. Clay textured soils have small pore spaces that cause water to drain slowly through the soil.

Detailed explanation-3: -Physical characteristics of soil par-ticles, such as size and shape, influence the porosity and permeability of soils and rocks. Coarse materials, like gravel and sand, tend to be both porous (they have large pore spaces that can fill with water) and permeable (water passes easily between the large particles).

Detailed explanation-4: -Clay is the most porous sediment but is the least permeable. Clay usually acts as an aquitard, impeding the flow of water. Gravel and sand are both porous and permeable, making them good aquifer materials. Gravel has the highest permeability.

Detailed explanation-5: -Soils arranged from most porous to least porous are potting soil, gravel, sand, silt, and clay. Dry soils arranged from fastest to slowest permeabilities are gravel, potting soil, sand, silt, and clay.