recycling

Question 1

what does reduction in use, reuse and recycling of materials by end users reduce?

Answer 1

the use of limited resources, use of energy sources, waste and environmental impacts

Question 2

3R’s

Answer 2

-reduce
-reuse
-recycle

Question 3

what are produced from limited raw materials?

Answer 3

metals, glass, building materials, clay ceramics and most plastics

Question 4

where does much of the energy for processes come from?

Answer 4

limited resources

Question 5

what process causes environmental impacts?

Answer 5

Obtaining raw materials from the Earth by quarrying and mining

Question 6

glass

Answer 6

-glass bottles can often be reused without reshaping
-other forms cannot be reused and so are recycled for a different use
-usually separated by colour and chemical composition before being recycled
-glass bottles can be crushed and melted to make different glass products

Question 7

metals

Answer 7

-can be recycled by melting and recasting or reforming into different products
-amount of separation required for recycling depends on the material and the properties required of the final product
-e.g some scrap steel can be added to iron from a blast furnace to reduce the amount of iron that needs to be extracted from iron ore