Various Layers of the Earth
The center and the hottest layer of the Earth. The inner core is heavy and consists of iron and nickel with temperatures up to 5,500 °C. Due to its enormous thermal energy, the inner core indicates the engine room of the Earth.
The outer core shows a very hot metallic sphere, with a temperature of about 40000F to 90000F. It is so hot that all the metal inside is liquid. The outer core lies about 1800 miles below the crust and is of 1400 miles in thickness. They are made of metals such as iron and nickel. The outer core surrounds the inner core.
The mantle is the widest part of the Earth. Its thickness is about 2,900 km. The mantle is primarily composed of semi-molten rock known as magma. Rocks are hard at the top of the mantle, but soften and begin to melt as they go down.
"The Earth has enough resources to meet the needs of all but not enough to satisfy the greed of even one person". How is this statement relevant to the discussion of development? Discuss.
The statement "The Earth has enough resources to meet the needs of all but not enough to satisfy the greed of even one person" explains the sustainability of the maintenance and development of resources.