Which of the following is an environmental benefit of recycling metals?
0%
It requires less energy than extracting from an ore
100%
It reduces the amount of landfill
0%
It reduces the cost of the metal
0%
Less metal ore needs to be taken from the ground
Q.2.
Why is it cheaper to recycle metals than to extract them from their ore?
0%
It can be done closer to where the metals are thrown away
100%
Transporting scrap metal is cheaper than transporting the ore
0%
The people who do the recycling are paid less than people who extract metals from the ores
0%
There are far less processes involved in recycling than in extracting metal from an ore
Q.3.
When they reach the place they are to be recycled, how is recycling of metals carried out?
0%
Metals are added to their molten ore
0%
Metals are taken from pieces of waste recovered from spoil heaps
0%
Metals are reduced using carbon and molded into ingots
100%
Metals are melted down and reshaped
Q.4.
Why is extracting from its ore so expensive compared to recycling it?
0%
Iron ore has to be mined
100%
The iron ore needs to be purified
0%
Extraction requires chemical reactions to be carried out
0%
All of the above
Q.5.
Apart from the costs associated with preparing the ore, which of the following is likely to make extracting aluminum expensive?
0%
The cost of the staff needed to work in the factory
100%
The cost of the electricity used during the electrolysis of the aluminum ore
0%
The cost of the carbon required to displace the aluminum from its ore
0%
The cost of casting the aluminum into ingots
Q.6.
Why is aluminum easy to recycle?
0%
It is a shiny metal
0%
It is a soft metal
100%
It is mainly made into drinks cans
0%
It has a relatively low melting point for a metal
Q.7.
Titanium is also an expensive metal. Only a small portion is ever recycled. Which of the following reasons is the most likely explanation?
0%
It is usually used in small quantities to make alloys rather than using it on its own
100%
It is only used to make small items and it is not worth it
0%
It is a heavy metal and the cost of transporting it for recycling is too expensive
0%
All of the above
Q.8.
Which of the following environmental issues could recycling metals reduce?
0%
Air pollution in cities
100%
Low level atmospheric ozone
0%
Pollution of land and rivers
0%
Cutting down of forests
Q.9.
Read the following information and then decide which of the four answers contains the missing words in the correct order. Before any metals can be ________ the scrap metal has to be collected, ____________ and sorted, which all cost money. The main problem with recycling metals is ____________ the useful metal from the rest of the rubbish. In domestic recycling plants iron and steel objects can be picked out using an __________ as most other materials are non-magnetic.