What Does it Mean to “Be in the Limelight?”

What does it mean to be in the ‘limelight’?

Uses of limestoneUses of limestone

L.O: To understand some of the uses of limestone

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Starter, true or false

1.Limestone is an igneous rock

2.Limestone’s chemical formula is CaCo3

3.Phytomining is where bacteria break apart minerals by leaching4.An alloy is a mixture of a metal and something else to make it stronger5.Covalent bonding is where two non metals share electrons6.Ionic bonding is where a metal and a non metal use iron to bond.

Manufacture of cementManufacture of cement

• The main raw materials for cement are limestone and clay.

• A small amount of gypsum is also added to help the cement set at the right speed.

Clay or shale

Limestoneor chalk

Gypsum(calcium sulphate)

heat

Cement

Cement, concrete and mortarCement, concrete and mortar

• To make concrete cement is mixed with small stones or gravel.

• Mortar consists of cement mixed with calcium hydroxide. This makes a smooth slow setting mixture suitable for bricklaying

Cement, concrete and mortar all set when interlocking crystals grow between cement particles joining them

together.

Limestone, sand and sodium carbonate are the raw materials used to make most glass.

Limestone

Lime(calcium

hydroxide)

Sand (silicondioxide)

Sodiumcarbonate

heat

water

Glass

heat

3 x worksheets.

The first 2 people to complete the ‘concrete and cement’ worksheet become markers.

The first 2 pupils to complete the ‘ores’ worksheet become the markers for that one.

Then complete the word search and stick it in. Then in pairs find a laptop, go to your class

folder and complete the ‘resources’ worksheet.

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LimestoneLimestoneLimestone is a __________ rock made up of mainly calcium carbonate. It’s cheap and easy to obtain. Some uses:

1) Building materials – limestone can be quarried and cut into blocks to be used in _______. However, it is badly affected by ____ ____.

2) Glass making – glass is made by mixing limestone with _____ and soda:

3) Cement making – limestone can be “roasted” in a rotary kiln to produce dry cement. It’s then mixed with sand and gravel to make _______.

Limestone + sand + soda glass

Words – sand, building, sedimentary, concrete, acid rain

Match it up

LimestoneLimestone

Limestone for indigestion

Iron Manufacture

Slaking of lime

Manufacture of quicklime

CaCO3 CaO + CO2

CaO + H2O Ca(OH)2

CaCO3 + 2HCl CaCl2 + H2O +CO2

CaCO3 + SiO2 CaSiO3 + CO2

Join matching pairs with arrows.

Making GlassMaking Glass

1. Weigh 3.5g boric acid, 0.5g zinc oxide and 6.5g lead oxide. (these three ingredients work in the same way as limestone, sand and soda but melt at a lower temperature) .

2. Mix the chemicals together in a crucible and add a VERY small amount of a transitional metal (this will colour the glass).

3. Heat the mixture on a roaring flame for about 5 minutes

4. Pour the contents quickly onto a heatproof mat.

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Limestone + sand + soda glass

WORD BINGO! Draw a 4x4 WORD BINGO! Draw a 4x4 gridgrid

Select some of these words to put in your grid in a RANDOM order.

Calcium carbonate LimestoneCalcium oxide QuicklimeSlaked lime LimewaterCalcium Hydroxide CementSand MortarConcrete GlassThermal Decomposition NeutralisationOre Reinforced concrete