Key Stage 3 Science Book 3 Assessments
Obtaining Useful Materials (Purple level)
1. Which gas is produced when a metal carbonate is decomposed by heating? [1 mark]
a) Hydrogen
b) Oxygen
c) Methane
d) Carbon dioxide
2. Which of these metals is extracted from its ores by electrolysis? [1 mark]
a) Iron
b) Copper
c) Lead
d) Sodium
3. Why is limestone added to a blast furnace? [1 mark]
a) To reduce iron ore
b) To increase the temperature inside the furnace
c) To separate impurities in the crushed ore
d) To speed up the reduction of iron ore
4. Which metal cannot be obtained by heating its ores with carbon? [1 mark]
a) Aluminium
b) Lead
c) Copper
d) Zinc
5. Zinc sulfide is roasted in air to produce zinc oxide. Zinc is extracted by heating zinc oxide with carbon.
Which of the following is not produced during this process? [1 mark]
a) Carbon dioxide
b) Nitrogen dioxide
c) Sulfur dioxide
d) Acid rain
© HarperCollinsPublishers 2014
Key Stage 3 Science Book 3 Assessments
6. Copper pyrites contains copper sulfide. What must it be changed into before the copper can be
extracted using carbon? [1 mark]
a) Copper carbonate
b) Copper oxide
c) Malachite
d) Copper sulfate
7. Place the steps in order, 1-4, to describe what happens during photosynthesis. [1 mark]
Green leaves absorb energy from the Sun
3
Bonds in carbon dioxide and water are
broken
4
New but slightly weaker bonds are made
1
Glucose and oxygen are formed
2
8. Match the energies of bond breaking and bond making to the descriptions. [1 mark]
Breaking reactant bonds = 500 kJ/mol; making product bonds = 2000
kJ/mol
Highly endothermic
Breaking reactant bonds = 600 kJ/mol; making product bonds = 800
kJ/mol
Slightly
endothermic
Breaking reactant bonds = 1500 kJ/mol; making product bonds = 400
kJ/mol
Highly exothermic
Breaking reactant bonds = 900 kJ/mol; making product bonds = 800
kJ/mol
Slightly exothermic
9. Which two applications might ceramics be useful for? [1 mark]
a) Electrical insulation
b) Electrical conduction
c) Making wash basins and baths
d) Making furniture
© HarperCollinsPublishers 2014
Key Stage 3 Science Book 3 Assessments
10. Which two sentences describe the enzyme catalase? [1 mark]
a) It increases the speed with which large molecules are broken down during digestion
b) It is destroyed when breaking down large molecules during digestion
c) It has a specific shape that enables it to break down large molecules during digestion
d) It changes the amount of energy transferred when large molecules are broken down during
digestion
11. Name two types of natural polymer found in plants. [2 marks]
12. Describe two problems with the manufacture of ceramics. [2 marks]
13. What are the raw materials needed to make concrete? [2 marks]
14. Scientists are trying to make a new synthetic polymer. It must have specific properties. What are the
main things they can vary? [2 marks]
15. Why is the ease of thermal decomposition of metal carbonates important in metal extraction? [2
marks]
© HarperCollinsPublishers 2014
Key Stage 3 Science Book 3 Assessments
16. Tennis rackets used to be made of wood. Why are they are usually made of carbon fibre nowadays?
[2 marks]
17. This is a diagram of a froth flotation tank:
Froth flotation is used in the extraction of some metals. What happens in the process is that ground up
ore, oil and water are pumped into the tank. Air is pumped in and the particles of metal gather in the
froth on top of the tank. Explain why this process is used in the mining industry. [4 marks]
18. Precious metals are often recycled from discarded computers. The processes involve sorting and
separating, dissolving in suitable acids or other solutions, and electrolysis. What affect might this have
on the environment?
[4 marks]
© HarperCollinsPublishers 2014