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a Chemistry 2 > Cq5- Using The Earths Resources > Flashcards

Cq5- Using The Earths Resources Flashcards

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1
Q

What do we use the earths resources for?

A

Food
Shelter
Fuel
Transport
Warmth

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2
Q

What are some natural resources?

A

Cotton, timber , wool

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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 run out and is not replenished at the rate we are using it

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5
Q

What is a renewable resource?

A

A resource that is replenished as fast as it is used

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6
Q

What is sustainable development?

A

Development that meets the current needs without compromising future needs

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7
Q

What are the four main types of water?

A

Pure, salt, fresh, potable

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8
Q

What is potable water?

A

Water that is safe to drink

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9
Q

How is potable water acquired from fresh water?

A

Filtration and sterilisation

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10
Q

What is sterilisation?

A

Killing microbes

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11
Q

What are examples of sterilising agents?

A

Chlorine, ozone, uv light

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12
Q

How can potable water be produced from salt water?

A

Desalination

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13
Q

How can desalinisation be carried out?

A

Reverse osmosis and distillation

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14
Q

What are the three main types of waste water?

A

Sewage, agricultural waste, industrial waste

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15
Q

What can waste water contain?

A

Organic matter, harmful microbes, harmful chemicals

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16
Q

What is the first process in processing waste water?

A

Screening and grit removal

17
Q

What is sedimentation?

A

Separating waste water into sludge and effluent

18
Q

How is sludge treated?

A

Anaerobic respiration

19
Q

How is effluent treated?

A

Aerobic respiration

20
Q

What is phytomining?

A

Using plants to extract copper

21
Q

What is bioleaching?

A

Using bacteria to extract copper

22
Q

What is a life cycle assessment?

A

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

23
Q

What are the stages of a life cycle assessment?

A

-extracting raw materials
-manufacturing and packaging
-use
-disposal

24
Q

How can we reduce the amount of new materials manufactured?

A

Reusing or recycling

25
Q

What are the ways not recyclable materials are disposed of?

A

Incineration or landfill

26
Q

What is a lechate?

A

Product of bioleaching produced by the bacteria containing the metal ore processed through electrolysis or displacement

a Chemistry 2 (6 decks)

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