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Science: 9E
2012-2013. Science. 9E
| Question | Answer |
|---|---|
| Cladding | Thin sheet or layer of material used to cover walls |
| Periodic tables: | Metals : Non metals : Semi metals |
| Metals | Solid at room temp. High melting and boiling points. Good conduction of heat and electricity. Rigid when thick. Bendy when thin. Malleable. Ductile. Magnetism (Iron, nickel, cobalt) Metal oxides are bases. |
| Non-metals | Half are gases at room temp. Low melting and boiling points. Poor conduction of heat and electricity. Good insulators. Not malleable/ductile. Not magnetic. Non-metal oxides are acids. |
| titanium + oxygen --> titanium oxide | Reaction doesn't change appearance. |
| copper + oxygen --> copper oxide | Turns green |
| zinc + oxygen --> zinc oxide | Paler grey than metal. |
| acid + base --> salt + water | neutralisation. |
| sulphuric acid + copper oxide --> | copper sulphate + water |
| hydrochloric acid + copper oxide --> | copper chloride + water |
| nitric acid + copper oxide --> | copper nitrate + water |
| phosphoric acid + copper oxide --> | copper phosphate + water |
| Copper sulphate is... | toxic to living organisms |
| Ores | Rocks that contain useful minerals |
| copper sulphide + oxygen --> | copper oxide + carbon dioxide |
| copper oxide + sulphuric acid --> | copper sulphate |
| Brass | Copper + Zinc |
| Cast iron (Good for intricate shapes) | Iron + Carbon |
| Steel (Strong and less reactive) | Less carbon |
| Iron + Oxygen --> | Iron oxide (rust) |
| Stainless steel: | Iron, Carbon, Nickel, Chromium (Chromium reacts faster, is unreactive) |
| Stone | Strong under compression, not under tension (pulling) |
| Sedimentary rock | Layers of sediment compacted and cemented together. Porous (Sand stone and Lime stone) |
| Igenous | From magma, not porous (Granite) |
| Metamorphic | From other rocks, changed by extreme heat or pressure, not porous (slate, marble) |
| calcium carbonate + sulphuric acid --> | calcium sulphate + carbon dioxide + water |
Created by:
bis.rui
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