3.3
Advantages of using natural fibres to make shopping bags
Very strong
Cause less pollution because they are biodegradable Long lasting
Can be printed or woven in nice patterns and colours Fire resistant
Can be turned into compost when no longer needed Air can pass through natural fibres, so it is safer if little children play with bag, they will not suffocate.
(any 6)
3.4 A description of any two of the following: recycle plastic bags; reuse plastic bags; reduce the number of plastic bags that we buy
(2 × 3 = 6)
3.5 Trusses are timber structures constructed in triangle shapes that hold up the roof. They make the roof of a house stronger because triangles are strong shapes. The forces involved in trusses are tension and compression.
Question 4 4.1 A drawing which is simple in shape to represent a more complex item
4.2 A large number of gears used to obtain the final speed
4.3 The use of machines to do the work which previously would have been done by workers
4.4 A person who studies rocks and layers in the earth Question 5
5.1 Open-cast mining extracts minerals from close to the surface of the Earth by removing the top layer to expose the mineral deposit.
5.2 A mine dump is a very large mound of waste material removed in the process of mining.
5.3 Toxic dust is surface dust which blows from mine dumps which cause health risks to humans.
5.4.1 Archaeologists have found evidence of vertical shaft mining in South Africa which they estimate to date back to AD 770.
5.4.2 The first diamond was discovered on the banks of the Orange River in 1887.
5.4.3 The Sishen mine in the Northern Cape is one of the largest open pit mines in the world.
133 (1) (1) (1)
(1) (1)
(1) [6]
(4) [23]
(2) (2)
(2)
(2) [8]
Disadvantages of using natural fibres to make shopping bags
More expensive to produce than plastic bags Not waterproof
Heavier than plastic bags
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