B2 Population and Pollution

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Author:
tah13
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274276
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B2 Population and Pollution
Updated:
2014-05-13 11:14:21
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B2g Population and Pollution
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  1. What has happened to the world's population since 1800?
    It's increased
  2. What is it called when a population grows at an ever-increasing rate?
    Exponential growth
  3. Why is there exponential growth in the human race?
    The birth rate is greater than the death rate.
  4. What's happening to the world's resources as the population is increasing?
    Being used up.
  5. What resources are being used up?
    Food, water andĀ fossil fuels.
  6. What is a result of increased use of resources?
    More waste being produced which pollutes the Earth.
  7. What does burning fossil fuels produce?
    Carbon Dioxide and Sulphur Dioxide.
  8. What does an increase in carbon dioxide result in?
    Global warming.
  9. What does global warming do and result in?
    It changes the climate which could lead to a rise in sea levels.
  10. What does sulphur dioxide produce?
    Acid rain.
  11. What does acid rain do?
    It kills tress and makes lakes acidic, causing fish to die.
  12. Where do CFCs come from?
    Fridges and aerosols.
  13. What do CFCs result in?
    Depletion of the Ozone layer which results in more UV rays reaching Earth and causing damage, e.g. increasing amount of people suffering from skin cancer.
  14. What is a carbon footprint?
    It measures the total greenhouse gas given off by a person or an organisation, in a given time - generally a year.
  15. In the world, where about is the greatest rise in population occurring?
    Underdeveloped countries, such as India and countries in Africa.
  16. In the world, which countries are using more energy and why?
    Developed countries, such as USA and countries in Europe. They burn more fossil fuels and use more energy due to the vast majority of people living an abundant lifestyle.
  17. What's the name given to a species which determines the levels of pollution?
    Indicator species.
  18. What's an example of an indicator species who can show air pollution levels?
    Lichen.
  19. How can lichen show levels of air pollution?
    They grow on rocks and trees where the air is clean. They don't grow in polluted areas, such as cities.
  20. What are example of indicator species who can show water pollution levels?
    Stonefly larva, mayfly larva, sludgeworm and rat-tailed maggot.
  21. How do those organisms show water pollution levels?
    Stonefly larva only live in water which isn't polluted. Mayfly larva are able to live in water which is slightly polluted. Sludgeworms and rat-tailed maggots are able to live in heavy polluted water.

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