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6. When you add acid to calcium carbonate you get:
- salt, carbon dioxide, water
- Bubbles!
- a calcium salt, carbon dioxide
- a calcium salt, carbon dioxide, water
- salt and water
7. Quarrying limestone messes up the landscape
8. Quarrying limestone releases carbon dioxide into the atmosphere
9. Cement factories make lots of dust
10. limestone is ----------- so it neutralises soil high in -----------
- alkaline, alkali
- acidic, alkali
- alkaline, acid
- acidic, acid
11. To make Cement into mortar we:
- mix it with clay and sand
- Mix it with sand and water
- Do nothing, they are the same.
- mix it with clay and water
12. To make cement into concrete we:
- Mix it with sand and aggregate
- Heat it with clay and aggregate
- Heat it with sand
- Mix it with clay and aggregate
- Heat it to make it set