7 vocab activities Term2

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.

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