Aluminum
An element is a substance that cannot be broken down into a simpler substance by any known means. Each of the 92 naturally occurring elements is therefore one of the fundamental materials from which everything in the universe is made. The element, Aluminum is the third most common element on Earth after Oxygen and Silicon. Also by far the most abundant metal on Earth, is now used very widely for everything from soft-drink cans to car bodies to window frames. Around 8 percent of Earth's outer layer (crust) is made up of aluminum. Compounds containing aluminum are found in materials as different as antacid medicines, the insulation material in our homes, and in the small white flecks (called vermiculite) in garden composts. Aluminum is a shiny, silvery metal. It is extremely light and so soft that a thick sheet can be bent easily by hand. When exposed to the air, the surface of the metal reacts with oxygen to form an aluminum oxide, coating, preventing further corrosion of the metal underneath. Also, aluminum have weak metals (like copper and tin) that scientists call "poor" metals. But aluminum alloys, mixtures of aluminum and other metals, produce materials as tough as steel. All these properties make aluminum a very i
Granites and dolerites are examples of igneous rocks. By recycling aluminum, you will be helping to complete the recycling loop--an aluminum can recycled today will be back on the grocery shelf in about 90 days. Two dramatic breakthroughs in the 1880's heralded the start of the aluminum industry. Although aluminum is less than one percent of the nation's municipal solid waste stream, it remains one of the most valuable recyclable materials. Indeed, many physicians believe that the buildup of large quantities of aluminum compounds in the body may be harmful. Aluminum is a also extremely resistant to corrosion. Because aluminum lying in our landfills will still be around in 200 or more years, recycling cans and scrap aluminum makes sense. This makes aluminum especially important in transport. Compounds containing aluminum are sometimes found in small amounts in the human body. Since it is the most common metal in the world, it follows that most minerals, rocks, and soils are rich in compounds containing aluminum. Twenty years ago it took 19 aluminum cans to make one pound, but today, aluminum beverage cans are lighter and it takes 29 cans to make a pound. Recycling one aluminum can saves enough energy to keep a 100-watt bulb burning for almost four hours or run your television for three hours. Every atom contains even smaller particles called protons, neutrons, and electrons. Tossing away an aluminum can wastes as much energy as pouring out half of that can's volume of gasoline.
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Acceptance Essays
