Rocks and Rocks and builidingbuiliding
1.2 Limestone and it’s uses1.2 Limestone and it’s uses
Learning objectivesLearning objectives
Know some of the different uses of Know some of the different uses of limestonelimestone
Understand what happens during Understand what happens during the thermal decomposition of the thermal decomposition of limestonelimestone
What are they made of?What are they made of?
Uses of Uses of LimestoneLimestone
Making glass
Improving soil fertility
And even the tourist trade…
Making concrete
Buildings
Calcium CarbonateCalcium Carbonate
Formed from tiny animals from Formed from tiny animals from millions of years agomillions of years ago
Can be quarried from groundCan be quarried from ground Cut into blocksCut into blocks
Used as building materialUsed as building material Powered limestonePowered limestone
Heated with powdered clay – cementHeated with powdered clay – cement Can be used to make concreteCan be used to make concrete
GlassGlass
Powdered limestonePowdered limestone Heated with sand and sodaHeated with sand and soda Produces glassProduces glass LiquidLiquid Flows over 100’s of yearsFlows over 100’s of years
Or does it?Or does it?
Uses of limestoneUses of limestone
Produce an A4 Produce an A4 advert for limestoneadvert for limestone
Powerpoint or wordPowerpoint or word Must include:Must include:
Where limestone Where limestone comes fromcomes from
The chemical nameThe chemical name 3 uses and how it is 3 uses and how it is
usedused
Limestone!!!
It’s great!!!
Blah Blah Blah etc etc etc
What is it etc
What’s it for etc
Heating limestoneHeating limestone
Limestone – Calcium carbonate CaCOLimestone – Calcium carbonate CaCO33 Which atoms?Which atoms?
Heat strongly – breaks down into Heat strongly – breaks down into quicklime (CaO)quicklime (CaO) Releases carbon dioxideReleases carbon dioxide Thermal decompositionThermal decomposition
Lime KilnLime KilnCalcium carbonateCalcium carbonate calcium oxide + calcium oxide +
carbon dioxidecarbon dioxideLimestoneLimestone QuicklimeQuicklime
Lime kilnLime kiln
Key pointsKey points
Limestone is mainly made of calcium Limestone is mainly made of calcium carbonatecarbonate
Limestone is widely used in buildingLimestone is widely used in building Limestone breaks down when you Limestone breaks down when you
heat it strongly (thermal heat it strongly (thermal decomposition) to make quicklime decomposition) to make quicklime and carbon dioxideand carbon dioxide
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