The Rock Cycle 3.0 / 5 based on 1 rating ? ChemistryRocks, ores, metals and alloysGCSEEdexcel Created by: GoCreated on: 29-12-12 18:46 Are sedimentary rocks soft or hard? Soft 1 of 27 Are igneous rocks soft or hard? Hard 2 of 27 Is marble formed from limestone and chalk? Yes 3 of 27 Extrusive igneous rocks cool quickly above ground, forming _____ crystals, e.g. basalt and rhyolite. Small 4 of 27 Intrusive igneous rocks cool slowly underground, forming _____, crystals, e.g. granite and gabbro. Big 5 of 27 Can you use granite to make steps and buildings? Yes 6 of 27 Calcium carbonate is found in the Earth's crust as... Marble, chalk and limestone. 7 of 27 Limestone is used as a _____ material. Building. 8 of 27 How do you form cement? Powdered limestone is heated in a kiln with powdered clay to make cement. 9 of 27 How do you form concrete? You mix the cement with sand, water and gravel to make concrete. 10 of 27 How do you form glass? You can heat limstone with sand and sodium carbonate until it melts to form glass. 11 of 27 When calcium carbonate is heated it thermally decomposes to make...WHAT? Calcium oxide and carbon dioxide. 12 of 27 How does thermal decomposition happen? Thermal decomposition happens when one substance chemically changes into at least two new substances when it's heated. 13 of 27 Thermal decomposition of carbonates gives off... Carbon dioxide. 14 of 27 Does zinc carbonate and copper carbonate thermally decompose in the same way as calcium carbonate to form an oxide and carbon dioxide. Yes 15 of 27 When you heat a carbonate in a boiling tube....and pipe off the gas into a test tube filled with limewater. The carbon dioxide will turn... Milky. 16 of 27 What is the word equation for thermal decomposition of copper? copper carbonate → copper oxide → carbon dioxide 17 of 27 What is the word equation for thermal decomposition of zinc? zinc carbonate → zinc oxide → carbon dioxide 18 of 27 What is the word equation for thermal decomposition of calcium? calcium carbonate → calcium oxide → calcium dioxide 19 of 27 Do all carbonates undergo thermal decomposition the same? - If not explain why... No - Because it depends on the stability of the metal carbonate. 20 of 27 Less stable carbonates will decompose ______ and the limewater will turn milky more quickly. Faster 21 of 27 Write the word equation for when calcium oxide reacts with water to produce calcium hydroxide... calcium oxide + water → calcium hydroxide 22 of 27 A precipitation happens when _____ solutions react and an insoluble forms in the solution. Two 23 of 27 What does aq (aqueous) mean? Dissolved in water. 24 of 27 What does (l) mean? Liquid. 25 of 27 What does (s) mean? Solid. 26 of 27 What does (g) mean? Gas. 27 of 27
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