Ocean currents can be generated by wind, density differences in water masses caused by temperature and salinity variations, gravity, and events such as earthquakes. Currents are cohesive streams of seawater that circulate through the ocean. Some are short-lived and small, while others are vast flows that take centuries to complete a circuit of the globe.
Answer by Hyllary. Confidence votes 247. Rawhide is made from the skin of animals, usually cow. The skin is split into inner and outer layers. The tough outer layer is used for leather shoes, garments, and upholstery, while the softer inner layer is cut and formed into different shapes for dog chews.ones are made from calcium. A typical bone has an outer layer of hard or compact bone, which is very strong, dense and tough. Inside this is a layer of spongy bone, which is â¦ like honeycomb, lighter and slightly flexible.
A baseball is made out of a round shaped center made of rubber or cork. This material is then wrapped tightly in yarn (string) and is wrapped with a plastic or leather cover. Horsehide was once used for major league balls, but cowhide is used today.There are 4 layers of yarn used on a baseball. The first layer is gray woolen yarn, the second and third are three-ply woolen yarn and the final is white cotton-polyester yarn.orsehide was once used for major league balls, but cowhide is used today. There are 4 layers of yarn used on a baseball. The first layer is gray woolen yarn, the second and third are three-ply woolen yarn and the final is white cotton-polyester yarn.