Gold and platinum are the most ductile metals on the periodic table of elements. Metals like copper, iron, nickel, manganese, silver, iridium, osmium, tungsten, tantalum, hafnium, rhenium, tin and zirconium can be drawn into very long wires. An ounce of gold can be drawn into a wire 50 miles long.
Metals are ductile because their atomic structure readily shares electrons between nuclei. The outer electrons of metals are constantly flowing across the surface and rolling over each other. As a result, the metal can be drawn into new shapes while maintaining the metallic bonds between atoms. Small amounts of metals can be drawn into long wires.Learn More
My Science Box explains that Earth is a biosphere, as it is a global sum of all ecosystems. A biosphere is a closed system containing various zones of life. All living organisms within a biosphere are organized into various layers of complexity. These layers extend from the individual, to populations and communities, to ecosystems and biomes.Full Answer >
Aluminum, copper, tin, mild steel, platinum and lead are examples of ductile materials. Ductile materials can be stretched without breaking and drawn into thin wires. Ductility is an important property for manipulating these metals by hammering, drawing or rolling. It makes possible their use for making electrical wires, pipes, plates and other metalworks.Full Answer >
Mass movement refers to the relocation of surface material resulting from gravity. The most common types of mass movement are landslides and rockfalls; these types of movements are very sudden. Other forms of mass movement include slump, rockslide, debris slide, flow and talus. Weathering and erosion are the major contributors to mass movement processes.Full Answer >
Naturally occurring structures include canyons such as the Grand Canyon in the United States, mountains such as Mount Everest, and even homes and nests that animals make for themselves, including beehives, ant hills, bird nests and beaver dams. Any form that stands on its own and has a definitive form that was not made by man is considered a natural structure. This is in contrast to man-made structures like buildings and bridges.Full Answer >