Cuts and scrapes may become infected when bacteria enter the wound, resulting in a skin infection. This causes changes in the texture of the skin and turns the surrounding skin red or white. Fungal infections, such as ringworm and tinea versicolor, can also trigger discolored skin patches on various parts of the body.
A plough (UK) or plow (US; both /ËplaÊ/) is a tool (or machine) used in farming for initial cultivation of soil in preparation for sowing seed or planting to loosen or turn the soil.
A small sieve such as used for sifting flour has very small holes. Coarse particles are separated or broken up by grinding against one-another and screen openings. Depending upon the types of particles to be separated, sieves with different types of holes are used. Sieves are also used to separate stones from sand.