using resources Flashcards

(17 cards)

1
Q

what is an advantage of modern resources?

A

more efficient

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2
Q

what is a disadvantage of modern recourses?

A

damage the earth more

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3
Q

what does finite mean?

A

will run out and cannot be replaced

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4
Q

what does renewable mean?

A

can be replaced as quickly as we use them

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5
Q

what does potable mean?

A

water that is safe to drink

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6
Q

what does sterilisation do?

A

kills bacteria and other microbes

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7
Q

what is desalination?

A

removing salt from salt water

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8
Q

what are some sources of waste water? (4)

A

washing machines
dishwasher
toilet
shower

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9
Q

what is a life-cycle-assessment?

A

an evaluation of all the resources used for the whole of a products life

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10
Q

what do plastic bags come from?

A

crude oil

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11
Q

what do paper bags come from?

A

wood

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12
Q

what are the 5 stages of LCA?

A

raw materials
manufacture
transport
use
disposal

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13
Q

what is phytomining?

A

using plants to extract copper

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14
Q

what is bioleaching?

A

the extraction of specific metals from their ores through the use of bacteria

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15
Q

what are some advantages of bioleaching? (3)

A

cheap
environmentally friendly
can be used in ores that are poor in quality

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16
Q

what are some disadvantages of bioleaching? (4)

A

slow
toxic chemicals
low efficiency
lots of waste

17
Q

what is avagadro’s number?