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Chemistry > Using the Earth's Resources > Flashcards

Using the Earth's Resources Flashcards

1
Q

what do we use earth’s resources for

A

-warmth
-shelter
-food
-fuel
-transport

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2
Q

what are some examples of Earth’s natural resources

A

-cotton
-wool
-timber

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3
Q

what are some examples of synthetic resources

A

-plastic
-polyester
-acrylic

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4
Q

what is a finite resource

A

a resource that will eventually run out

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5
Q

what is sustainable development

A

development that meets the needs of current generations without compromising the ability of future generations to meet their own needs

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6
Q

what are the 4 main types of water

A

-pure water
-salt water
-fresh water
-potable water

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7
Q

in the UK, how is potable water extracted from fresh water

A

filtration and sterilisation

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8
Q

what is sterilisation

A

killing microbes

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9
Q

what are 3 examples of sterilising agents

A

-chlorine gas
-UV light
-ozone

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10
Q

how can potable water be produced from salt water

A

desalination

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11
Q

how can desalination be carried out

A

distillation or reverse osmosis

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12
Q

what are the 3 main types of waste water

A

-sewage
-agricultural waste
-industrial waste

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13
Q

what can waste water contain

A

-organic matter
-harmful microbes
-harmful chemicals

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14
Q

what is the first step in processing waste water

A

screening and grit removal

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15
Q

what is sedimentation

A

separating the waste water into sludge and effluent

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16
Q

how is sludge treated

A

anaerobic respiration

17
Q

how is effluent treated

A

aerobic respiration

18
Q

what is phytomining

A

using plants to extract copper

19
Q

what is bioleaching

A

using bacteria to extract copper

20
Q

what is a life cycle assessment

A

a way of assessing the energy costs and environmental effect of a product across its lifetime

21
Q

what are the 4 stages of a life cycle assessmentq

A

-extracting and processing raw materials
-manufacturing and packaging
-use and operation during its lifetime
-disposal at the end of its useful life

22
Q

how can we reduce the amount of new materials being manufactured

A

by reducing, reusing or recycling products

23
Q

in what ways can materials that are not recycled be disposed

A

-landfill
-incineration

Chemistry (15 decks)

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