What Does it Mean to “Be in the Limelight?”
What does it mean to be in the ‘limelight’?
Uses of limestone
23/03/2016
L.O: To understand some of the uses of
limestone
Starter, true or false
1.
2.
3.
4.
Limestone is an igneous rock
Limestone’s chemical formula is CaCo3
Phytomining is where bacteria break apart minerals by leaching
An alloy is a mixture of a metal and something else to make it
stronger
5. Covalent bonding is where two non metals share electrons
6. Ionic bonding is where a metal and a non metal use iron to bond.
Manufacture 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.
Limestone
or chalk
heat
Cement
Clay or shale
Gypsum
(calcium sulphate)
Cement, 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.
Sodium
carbonate
Glass
Limestone
heat
water
Lime
(calcium
hydroxide)
heat
Sand (silicon
dioxide)
 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.
Limestone
23/03/2016
Limestone 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:
Limestone + sand + soda
glass
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 _______.
Words – sand, building, sedimentary, concrete, acid rain
Match it up
Limestone
Join matching pairs with arrows.
Limestone for
indigestion
Iron
Manufacture
CaO + H2O  Ca(OH)2
CaCO3  CaO + CO2
CaCO3 + 2HCl CaCl2 + H2O +CO2
CaCO3 + SiO2  CaSiO3 + CO2
Slaking of
lime
Manufacture
of quicklime
Making Glass
Limestone + sand + soda
23/03/2016
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.
WORD BINGO! Draw a 4x4 grid
Select some of these words to put in your grid in
a RANDOM order.
Calcium carbonate
Calcium oxide
Slaked lime
Calcium Hydroxide
Sand
Concrete
Thermal Decomposition
Ore
Limestone
Quicklime
Limewater
Cement
Mortar
Glass
Neutralisation
Reinforced concrete