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1. What can Dissolved Oxygen Meters be used to detect?

  • The ratio of Sulphur Dioxide in comparison to Oxygen
  • Changes in levels of water pollution
  • Changes in the levels of water in a river
  • How many Mayfly Larvae are in the Water
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2. Define Distribution Of An Organism

  • An increase in non living factors
  • How many organisms there are
  • Where an organism lives
  • The population of an organism

3. What are the 3 affects of Environmental Change?

  • Population increases/ decreases and changes in the distribution of an organism
  • Changes in the distribution of an organism, mates, amount of food available
  • Population increases/ decreases and amounts of other species
  • Changes in number of predators, prey and food

4. If there are lots of Mayfly Larvae in an area, what does this indicate?

  • Clean air with a high concentration of Oxygen
  • Polluted air with a high concentration of Sulphur Dioxide
  • Clean water as of the high concentrations of dissolved Oxygen
  • Polluted water with a high concentration of Sulphur Dioxide

5. Which non living indicator of environmental change can be used to detect changes in the temperature of sea surfaces?

  • Dissolved Oxygen Meters
  • Satellites
  • Rain Gauges
  • Mayfly Larvae


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