Student Name:
Year 10 Science Home Learning Booklet
Limestone Foundation Level
To be handed in on or before:
Question
Number
Total Marks
1
2
3
4
5
6
7
8
Total
Total
10
3
7
9
8
13
10
3
63
%
Approximate grade boundaries
C
D
E
F
G
My Mark
60%
50%
40%
30%
20%
1.
An old lime kiln made in the ground is shown.
Stones
Coal
Calcium
carbonate
Soil
Soil
Fire
(a)
The thermal decomposition of calcium carbonate makes a white solid and
carbon dioxide.
(i)
Name a naturally occurring form of calcium carbonate.
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(1)
(ii)
What does thermal decomposition mean?
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(2)
(iii)
Suggest and explain the purpose of the coal.
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(2)
(iv)
Write a word equation for the thermal decomposition of calcium
carbonate.
...................................  ................................... +
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(2)
(b)
The diagrams show what happens when drops of cold water are added to
the white solid formed by heating calcium carbonate.
Water
Cracks
appear
White
solid
(ii)
What type of chemical reaction takes place?
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(1)
(ii)
Give the chemical name of the solid formed. Give a use of this
solid.
Name
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Use
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(2)
(Total 10 marks)
2.
Bags of readi-to-mix concrete contain three ingredients.
Readi-to-mix Concrete
contains
cement
crushed rock
sand
Complete each sentence by choosing the correct words from the box.
clay
limestone
salt
slaked lime
water
Cement is made by heating.......................................... and
......................................... in a rotary kiln.
To make concrete, the contents of the bag of readi-to-mix concrete must be
mixed with
............................................................................... .
(Total 3 marks)
3.
Soda-lime glass is made by heating, to above 1500 C, a mixture of:
soda (sodium carbonate), Na2CO3
limestone (calcium carbonate), CaCO3
sand (silicon dioxide), SiO2
(a)
(i)
Which element do all of these compounds contain?
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(1)
(ii)
Explain what the formula Na2CO3 shows about the compound.
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(2)
(b)
Calcium carbonate breaks down when heated to above 1500 C.
(i)
Write a word equation to show what happens.
..................................  .................................. 
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(2)
(ii)
What is the name of this type of chemical reaction?
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(1)
(c)
The melting point of soda-lime glass is about 750 C. The raw materials
for making soda are limestone and common salt (sodium chloride). There
are almost unlimited amounts of the raw materials available to
manufacture soda-lime glass.
From the information given, what is the most important reason for
recycling soda-lime glass?
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(1)
(Total 7 marks)
4.
Sea water contains magnesium ions. Magnesium oxide can be obtained from sea
water using the following process.
Limestone
CaCO 3
Quicklime
CaO
Sea water
Water
Slaked lime
Ca(OH) 2
Precipitate of
magnesium
hydroxide
(a)
Separate from
sea water and
then heat
Magnesium
oxide
State the chemical name for limestone.
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(1)
(b)
Write a word equation for the action of heat on limestone.
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(2)
(c)
State the chemical name for slaked lime.
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(1)
(d)
Write a balanced chemical equation for the addition of water to quicklime.
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(2)
(e)
How can magnesium hydroxide be separated from sea water?
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(1)
(f)
Suggest and explain how magnesium could be obtained from magnesium
oxide.
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(2)
(Total 9 marks)
5.
Limestone is a useful rock.
(a)
Limestone can be used to make several useful products.
Draw rings around two useful products made from limestone.
cement
diesel
plastic
glass
petrol
(2)
(b)
A student did some experiments to study limestone.
In one experiment, a piece of limestone was heated very strongly as shown
in the diagram.
Piece of
limestone
Tin lid
(i)
Suggest one safety precaution that the student should take when
doing this experiment.
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(1)
(ii)
When limestone is heated it forms two products; a white powder
and a gas.
Complete the word equation by choosing the correct product from
the list.
calcium carbide
calcium hydroxide
calcium oxide
calcium nitride
 …………………………………..……
calcium carbonate heat
+ carbon dioxide
(limestone)
(1)
(c)
The student did another experiment using 2.00 grams of limestone.
The limestone was weighed before and after being heated.
The student then repeated this experiment.
A new sample of 2.00 grams of limestone was used.
The results are shown in the table.
Experiment 1
Experiment 2
Mass of limestone before heating
in grams (g)
2.00
2.00
Mass of limestone after heating
in grams (g)
1.12
1.10
Mass lost in grams (g)
0.88
0.90
(i)
Calculate the average mass lost for the two experiments.
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Average mass lost = .............................................. g
(1)
(ii)
Explain why it was important for the student to repeat this
experiment.
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(1)
(iii)
Suggest why the mass lost was not the same for the two
experiments.
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(1)
(iv)
Explain why a balance which measures to the nearest 0.1 g would
not be suitable for this experiment.
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(1)
(v)
Suggest what mass of carbon dioxide would be produced when 2.00
g of limestone is heated.
Mass of carbon dioxide produced = ........................g
(1)
(d)
The drawing shows a limestone quarry.
(i)
Suggest two ways in which the limestone quarry may harm the
environment.
1
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2
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(2)
(ii)
Suggest two ways in which the limestone quarry is of benefit to
people.
1
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2
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(2)
(Total 13 marks)
6.
Iron ore is the main source of iron.
(a)
This was the headline in a newspaper.
‘Village protests against quarry’
The dotted line ( ---- ) on the map is drawn around the area from which a
company
wants to quarry iron ore.
(i)
Give one reason that the company could give for the need to quarry
the iron ore.
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(1)
(ii)
The people who live in the village do not want the quarry because it
would decrease the value of their homes.
Suggest two other reasons why the villagers do not want the quarry.
1
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2
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(2)
(b)
Iron ore contains the compound iron oxide, Fe2O3.
(i)
Iron is extracted from its oxide in the blast furnace.
Complete the word equation for the extraction of iron.
iron oxide  ...............................................................  iron 
carbon dioxide
(1)
(ii)
This diagram represents pure iron.
Use the diagram to explain why pure iron is described as an
element.
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(2)
(iii)
Pure iron is relatively soft. The iron from the blast furnace is hard
and brittle. The diagram below represents iron from the blast
furnace.
Use the diagram to explain why iron from the blast furnace is hard
and brittle.
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(2)
(Total 8 marks)
7.
Limestone has been called the Earth’s most useful rock.
(a)
Limestone contains calcium carbonate, CaCO3.
(i)
Complete the table to show the number of atoms of each element in
the formula of calcium carbonate.
Calcium has been done for you.
Element
Number of atoms in the formula CaCO3
Calcium, Ca
1
Carbon, C
Oxygen, O
(2)
(ii)
The diagram below represents a carbon atom.
Use words from the box to label the parts of this atom.
bond
electron
molecule
nucleus
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(2)
(b)
At a cement works, limestone is mixed with clay and heated in a kiln.
Argon
Carbon dioxide
Nitrogen
Limestone and clay
Chimney
Kiln
Methane and air
Cement
Use the information in the diagram to answer these questions.
(i)
Name the fuel that is used to heat the limestone and clay.
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(1)
(ii)
Limestone contains calcium carbonate, CaCO3.
Draw a ring around the correct gas in the box to complete the
sentence.
The gas formed when calcium carbonate decomposes is
argon.
carbon dioxide.
nitrogen.
(1)
(c)
The cement works starts to burn a different fuel.
Local residents are concerned because more children are suffering asthma
attacks.
Residents have also noticed that parked cars are becoming dirty because of
smoke particles from the chimney.
The table shows the possible medical risk from smoke particles.
(i)
Particle size in mm
Medical effect
Larger than 0.4
No medical risks known
0.3 and smaller
Causes asthma attacks
0.2 and smaller
May cause cancer
Give two reasons why local residents are concerned about the
cement works burning a different fuel.
1
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2
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(2)
(ii)
The company operating the cement works stated that smoke
particles from the chimney had not changed since it started burning
the different fuel.
If you were a local resident, what evidence would you like to see to
help you decide if the company’s statement is true or not?
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(2)
(Total 10 marks)
8.
Lime (calcium oxide) is used in agriculture to reduce the acidity of soils.
Describe, as fully as you can, the reaction by which lime is made.
Name any other product(s).
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(Total 3 marks)