Earth Materiels 0.0 / 5 ? ChemistryThe earth and its atmosphereGCSEEdexcel Created by: priyabasraCreated on: 12-11-16 13:06 Lithosphere Includes the crust and part the mantle(upper) 1 of 29 The core Made from irons and lies at the centre 2 of 29 The crust The thin rocky layer at the surface 3 of 29 The mantle Between the crust and the core 4 of 29 Oceanic plates They are under the sea. They are more dense than continental plates. 5 of 29 Continental plates Carry the continents 6 of 29 S Waves Transverse, slow moving, only travels through solids. 7 of 29 P Waves Longitudinal,fast moving, travels through solids and liquids. 8 of 29 Where are S waves and P waves produced? Earthquakes 9 of 29 Limestone Calcium Carbonate 10 of 29 Pros of STEEL compared to aluminium Stronger and Cheaper 11 of 29 Pros of ALUMINIUM compared to steel lightweight and doesn't rust or corrode 12 of 29 Steel is made out of... 98% iron 13 of 29 OILRIG Oxidation is loss of electrons and Reduction is gain of electrons. 14 of 29 Rusting is caused by.. oxygen,water,salt and acid. 15 of 29 Rusting It only happens to iron. 16 of 29 Alloy A metel mixed with an element. 17 of 29 why are ALLOYS made? To change the metals properties and make it more useful. 18 of 29 Cathode Negatively charged electrode 19 of 29 Anode Positively charged electrode 20 of 29 Methods of extracting SALT are... Extraction from the sea, Salt mining and solution mining. 21 of 29 Positive ions called CATIONS are attracted to... Cathodes 22 of 29 Negative ions called ANIONS are attracted to... Anodes 23 of 29 A fuel cell A special type of electrical cells. They do not need replacing or recharging. 24 of 29 Process of fuel cells equation Hydrogen + Oxygen = Water 25 of 29 Fuel cell advantages Lightweight, non-pollutant, energy is converted directly from chemical to electrical, long lifespan and efficient. 26 of 29 Fuel cell disadvantages Raw materiel's are needed(oxygen and hydrogen) and poisonous catalysts have to be disposed at the end. 27 of 29 What is in paint? A pigment(gives it colour), a binding medium(this sticks the pigment to the surface) and a solvent( thins out the paint) 28 of 29 Why is paint a colloid? Because the pigment is dispersed in the binding medium. 29 of 29
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