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Chemistry Paper 2 > Atmosphere and resources > Flashcards

Atmosphere and resources Flashcards

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1
Q

Renewable resources

A

Solar, Wind, Sea etc.

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2
Q

Non-renewable resources

A

Finite, fossil fuels

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3
Q

What does LCA stand for

A

Life Cycle Assessment

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4
Q

What is potable water

A

Water that can be drunken safely

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5
Q

How do you remove salt from water

A

Desalination

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6
Q

How do you make pure water

A

Distillation

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7
Q

Why don’t we use distillation and desalination as often

A

It’s too expensive

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8
Q

To spent less, what processes do we use to obtain potable water

A

Filtration
Sterilisation

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9
Q

What does serialisation do

A

Kill microbes via chlorine ans UV light

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10
Q

5 main aspects of LCA

A
  1. Raw material
  2. Manufacture
  3. Distribution
  4. Use
  5. Disposal
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11
Q

What are alloys

A

Mixture of metals
(Eg. Carbon +iron = steel, gold and bronze)

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12
Q

What is corrosion

A

Metals reacting with oxygen and produce rust (iro oxide)

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13
Q

What are HDPE/LDPE

A

Polyethene molecules at high/low density

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14
Q

What is thermoetting

A

Polymers that harden when heated

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15
Q

What is thermoplastics

A

Polymers that soften when heated

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16
Q

What are composites

A

Non-metal alloys
(Fibre glass)

17
Q

how to extract metals

A

Reduction reactions
Electrolysis
Displacement
Bioleaching
Phytominig

18
Q

What was in the early atmosphere

A

Hydrogen and Helium

19
Q

What do erupting volcanos produce

A

CO2 - carbon dioxide
H20 - water vapour
NH3 - nitrogen
CH4 - methane

20
Q

What do sea/oceans abosorb

A

Co2 and lock it up in carbonates

21
Q

What percentage of gasses are in our atmosphere currently

A

N2 - 78%
O2 - 21%
CO2 - 0.04%
Ar - 1%
Water vapour - 4%

22
Q

What is the greenhouse effect

A

Shortwave lengths that pass through the atmosphere which then are reflected back from the planet as longer wave lengths and re absorbed by gasses keeping planet warm

23
Q

What is a carbon footprint

A

The net amount of carbon dioxide emmited in the planet

Chemistry Paper 2 (4 decks)

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