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8.3 Humans and their effects on the environment
Fichas del conjunto (12)
- 1Why is increasingly more waste being produced?Rapid growth in the human population
Increase in the standard of living - 2What will happen if waste is not properly handled?More pollution will be caused
- 3What might waste pollute?Water, with sewage, fertiliser or toxic chemicals
Air, with smoke and gases such as sulphur dioxide, which contributes to acid rain
Land, with toxic chemicals such as pesticides and herbicides, which may be washed from land into water - 4What might cause eutrophication?Sewage and fertilisers
- 5What is eutrophication?An increase in the concentration of mineral ions in the water stimulates grown of algae and/or plants
Eventually the growth of the algae and/or plants results in some of these being unable to receive sufficient light for photosynthesis and these organisms dies
There is large increase in the population of micro organisms that feed on these dead organisms
The respiration of the micro organisms depletes the oxygen concentration in the water, leading to the death of aerobic organisms - 6Name the four things humans do which reduces the amount of land available for other animals?Building
Quarrying
Farming
Dumping waste - 7Why as large-scale deforestation in tropical areas occurred?So that there can be increases in cattle and rice fields to provide more food. These organisms produce methane - this has lead to increases in methane in the atmosphere
So that crops can be grown from which bio fuels, based on ethanol, can be produced - 8What has large-scale deforestation in tropical areas increased?The release of carbon dioxide into the atmosphere (because of burning and the activities of micro organisms)
- 9What has large-scale deforestation in tropical areas reduced?The rate at which carbon dioxide is removed from the atmosphere and 'locked up' for hundreds of years as wood
- 10What does loss of forest lead to?Reduction in biodiversity
- 11What does the destruction of peat bogs do?Releases carbon dioxide into the atmosphere
- 12Why are peat free composts of increasing importance?They contain sustainable alternatives to the use of peat
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- GCSE (8 Adaptation and interdependence) Biology Fichas sobre 8.3 Humans and their effects on the environment, creado por Anisha Rai el 03/05/2016.
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- Anisha Rai
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