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Chemistry > Resources > Flashcards

Resources Flashcards

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1
Q

What do humans use resources for?

A

Warmth, shelter and food

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2
Q

What are finite resources?

A

Resources that will run out

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3
Q

What is sustainable development?

A

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

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4
Q

Give an example of a natural product that has been replaced by a synthetic product

A

Cotton has been replaced by polyester

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5
Q

What is potable water?

A

Water that is safe to drink

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6
Q

In the UK how is potable water produced?

A

Passing fresh water through filter beds and sterilising

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7
Q

How is water sterilised?

A

Using chlorine, ozone or ultraviolet light

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8
Q

What is desalination?

A

Removal of saly from sea water

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9
Q

In what two ways can desalination be carried out?

A

Reverse osmosis or distillation

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10
Q

What is the main disadvantage of desalination?

A

It requires a large amount of energy

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11
Q

In what kinds of locations is desalination carried out?

A

Ones where there is limited supply of fresh water

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12
Q

What needs to be removed from sewage and agrictultural waste water?

A

Organic matter and harmful microbes

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13
Q

What needs to be removed from industrial waste water?

A

Organic matter and harmful chemicals

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14
Q

How is sewage treated?

A

Screening, sedimentation, anaerobic digestion, aerobic biological treatment

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15
Q

Name two new ways of extracting copper from low-grade ores

A

Phytomining and bioleaching

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16
Q

What is a low grade ore?

A

Rock with only a small amount of metal compound in it

17
Q

How is phytomining carried out?

A

Plants absorb metal compounds, are harvested and then burned to produce ash

18
Q

How is bioleaching carried out?

A

Bacteria are used to produce a leachate solution

19
Q

How can copper be produced from the products of phytomining or bioleaching?

A

Electrlysis or displacement with scrap iron

20
Q

What is a life cycle assessment?

A

A way of assessing the environmental impact of a product across its entire life cycle

21
Q

What are the four stages in a product’s life cycy?

A

Extracting and processing raw materials, manufacturing and packaging, use and operation, disposal
distribution at each stage.

22
Q

Why is it important to reduce use, recycle and and reuse products?

A

Reduces the use of limited resources, energy sources and environmental impacts

23
Q

Give an example of a product that can be reused

A

Glass

24
Q

Given an example of a product that can be recycled

A

Metal

Chemistry (21 decks)

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