B2G REVISION NOTES

SINGLE SCIENCE, OCR BOARD - HIGHER TIER, BIOLOGY - B2G

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Graph conclusion
All the graphs show an increase in population over time. The
most dramatic increase in India where the population had
increased doubled, rapidly in the last 50 years. USA, the
population is increasing steadily but in the last 90 years the

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In the UK the population
has increased but recently it has increased much slower.
All three graphs so an increase but the rate of increase varies
from country to country. USA and India are fast but India is
fastest.
In the future I have predicted India will probably double in the
next 40 years, the UK will stay at a steady rate and USA will
go steadily but faster in the UK.…read more

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This is due to an increase in medication (higher birth rate,
high life expectancy), education, technology, all lead to
lee poverty
However, these advantages can lead to problems; far more
resources are being used because of:
Technology
`Throwaway' society
Use of fuels
Deforestation
This in turn leads to:
Global warming caused by excess CO production
Destruction of the ozone layer by CFC's (aerosols and
fridges)
Acid rain from sulphur dioxide and nitrogen dioxide
Scientists have work on methods to access levels of
pollution…read more

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