7 vocab activities Term2
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each of the black spaces below before clicking
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| crust | Made up of several elements: oxygen; aluminium; silicon and iron
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| Mantle | Made up of rocks: magnesium and iron
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| Outer core | Made up of nickel and iron
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| Inner Core | Made up of nickel and iron
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| 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
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| 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
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| 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
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| potassium | a chemical element with symbol K. It was first isolated from the ashes of plants.
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| silicon | A non-metallic element, having amorphous and crystalline forms.It combines minerals and rocks. Used in steel-alloys and alloys
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| peridotite | a dense, coarse-grained plutonic rock containing a large amount of olivine, believed to be the main constituent of the earth's mantle
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| iron | a strong, hard magnetic silvery-grey metal.
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| dense | closely compacted in substance
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| oceanic crust | the relatively thin part of the earth's crust which underlies the ocean basins
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| geothermal energy | is the heat from the Earth. It's clean and sustainable
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| approximately | Used to show that something is almost, but not completely, accurate or exact; roughly
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| oxygen | a colourless, odourless reactive gas, the life-supporting component of the air.
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| 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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