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7Earth Science
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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Shelleyno1
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