Interpreting Data

1
Interpreting Data

• LO to be able to draw and interpret graphs

2
How do we know how polluted the air is?

• Southampton air quality

3
What is global dimming?
4
Global dimming

• Global dimming is caused by tiny particles that
  are released when fuels burn.
• The amount of sunlight reaching the Earths
  surface has decreased by about 2 per cent every
  ten years, because more sunlight is being
  reflected back into space. The particles from
  burning fuels reflect sunlight.

5
The great smog

• Answer the questions in your books using the
  graphs on the sheet. You have 20-25 minutes.
• Level 4 information is used to make judgments
  when pollution was high/low
• Level 5 graph patterns described with
  conclusion formed
• Level 6 graph used to speculate causes of
  pollution, linked to health problems. Other forms
  of pollution taken into consideration
• Level 7 clear and detailed observations made,
  linking increases in pollution with increases in
  health problems (smoke causing respiratory
  problems sulphur dioxide leading to acid rain
  killing plants so increasing global warming etc)
  

6
Peer AssessmentUse the following answers to mark
your partners work and give them a level.

• Black smoke sulphur dioxide
• Both steadily decreasing
• Tighter regulations for vehicles / reduced
  industrial growth / different power sources (i.e.
  less coal fired power stations)
• Black smoke levels in 1962 were 158?g/m3 and in
  1996 the level was 10?g/m3. This is a decrease of
  148?g/m3
• Sulphur dioxide levels in 1962 were 180?g/m3 and
  in 1996 the level was 26?g/m3. This is a
  decrease of 154?g/m3

7
Answers

1. 1962-1963 saw a black smoke drop of 38?g/m3
2. 1962-1963 saw a sulphur dioxide drop of 37?g/m3
3. Clean air act put into place in early part of
   1960s
4. Black smoke more obvious than sulphur dioxide
5. Black smoke can cause respiratory problems
6. Sulphur dioxide causes acid rain, leading to
   deforestation and potentially an increase in
   global warming rate

8
Answers

• Suggestion that as pollution levels increases, so
  does mortality rates clear data between 5th and
  10th December 1952
• Analysis of mortality rates and what people died
  of growth of organisms (i.e. tree growth
  suggestive of environmental conditions) average
  temperature can be suggestive with pollution
  levels etc
• Important to monitor carbon dioxide methane
  ozone etc

9
Levels

• Level 4 information is used to make judgments
  when pollution was high/low
• Level 5 graph patterns described with
  conclusion formed
• Level 6 graph used to speculate causes of
  pollution, linked to health problems. Other forms
  of pollution taken into consideration
• Level 7 clear and detailed observations made,
  linking increases in pollution with increases in
  health problems (smoke causing respiratory
  problems sulphur dioxide leading to acid rain
  killing plants so increasing global warming etc)

10
Graphing data

• Use the following data to construct your own
  graph to show levels of air pollution
• Colour code it to reflect the levels of health
  concern

City Air Quality index value
London (UK) 47
Rome (Italy) 136
Beijing (China) 259
Perth (Australia) 24
New York (USA) 79
Rio De Janero (Brazil) 187
Tokyo (japan) 162
Juneau (Alaska) 6
11
Graph Marking

• 1 mark Correctly labelled x axis
• 2 marks Correctly labelled and scaled y axis
• 3 marks correctly drawn bars
• 4 marks correct colour code used.