Term | Definition |
crust | Made up of several elements: oxygen; aluminium; silicon and iron |
Mantle | Made up of rocks: magnesium and iron |
Outer core | Made up of nickel and iron |
Inner Core | Made up of nickel and iron |
magnesium | a metallic element that burns with a dazzling white light , used in lightweight alloys, batteries. s also used in flash bulbs and pyrotechnics, as it burns with a brilliant white flame |
calcium | a silver-white metal, occurring combined in limestone, chalk, gypsum, etc., occurring also in vertebrates and other animals, as a component of bone and shell |
aluminium | light in weight, malleable and not readily corroded or tarnished, occurring combined in nature in igneous rock, shale, clay, and most soil: used in alloys and for lightweight utensils |
potassium | a chemical element with symbol K. It was first isolated from the ashes of plants. |
silicon | A non-metallic element, having amorphous and crystalline forms.It combines minerals and rocks. Used in steel-alloys and alloys |
peridotite | a dense, coarse-grained plutonic rock containing a large amount of olivine, believed to be the main constituent of the earth's mantle |
iron | a strong, hard magnetic silvery-grey metal. |
dense | closely compacted in substance |
oceanic crust | the relatively thin part of the earth's crust which underlies the ocean basins |
geothermal energy | is the heat from the Earth. It's clean and sustainable |
approximately | Used to show that something is almost, but not completely, accurate or exact; roughly |
oxygen | a colourless, odourless reactive gas, the life-supporting component of the air. |
iron | a strong, hard magnetic silvery-grey metal, much used as a material for construction and manufacturing, especially in the form of steel. |