using resources Flashcards
(17 cards)
what is an advantage of modern resources?
more efficient
what is a disadvantage of modern recourses?
damage the earth more
what does finite mean?
will run out and cannot be replaced
what does renewable mean?
can be replaced as quickly as we use them
what does potable mean?
water that is safe to drink
what does sterilisation do?
kills bacteria and other microbes
what is desalination?
removing salt from salt water
what are some sources of waste water? (4)
washing machines
dishwasher
toilet
shower
what is a life-cycle-assessment?
an evaluation of all the resources used for the whole of a products life
what do plastic bags come from?
crude oil
what do paper bags come from?
wood
what are the 5 stages of LCA?
raw materials
manufacture
transport
use
disposal
what is phytomining?
using plants to extract copper
what is bioleaching?
the extraction of specific metals from their ores through the use of bacteria
what are some advantages of bioleaching? (3)
cheap
environmentally friendly
can be used in ores that are poor in quality
what are some disadvantages of bioleaching? (4)
slow
toxic chemicals
low efficiency
lots of waste
what is avagadro’s number?
6.02 x 10^23
