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Across 1. calcium carbonate 3. quicklime 8. a building material produced by mixing powdered limestone with sand and sodium carbonate 9. calcium hydroxide 11. the gas produced from the thermal decomposition of some metal carbonates 12. the substance used in building produced by mixing slaked lime with sand and water 13. the chemical name for CaCO3

Down 2. the type of reaction when limestone forms quicklime and carbon dioxide 4. the chemical name for Ca(OH)2 5. a thermal decomposition is an ex-------- reaction 6. a building material produced by adding crushed rocks to water, cement and sand 7. the chemical name for CaO 10. where limestone forms quicklime and cabon dioxide