ch10

Question 1

what does potable water mean?

Answer 1

it is safe to drink

Question 2

what gas can make water potable

Answer 2

chlorine gas as it sterilises it

Question 3

why are Life Cycle Assessments done ?

Answer 3

to assess the environmental impact of the product

Question 4

difference between potable water and pure water

Answer 4

pure:has no dissolved solids
potable: has dissolved solids

Question 5

describe how groundwater is treated to produce potable water

Answer 5

filtered
sterilised

Question 6

describe how seawater is treated to produce potable water

Answer 6

desalination
reverse osmosis

Question 7

test for pure water

Answer 7

boils at 100 degrees

Question 8

process of phytomining

Answer 8

fast growing plants are grown on soil containing a low grade copper ore-plants take up copper to their leaves

plants burnt and ash dissolved in sulphuric acid to produce copper sulphate

the metal can be extracted by displacement

Question 9

what is sustainable dev