Question | Answer |
What is an indicator species? | Organisms whose reactions to changes in environments can be studied to see human effect on the environment. |
What are lichen sensitive to? | The amount of sulfur dioxide in the atmosphere. |
What does it mean if there are a lot of lichen in an environment? | Low levels of air pollution. |
What can be an indicator to water pollution? | Mayfly larvae. |
Why are mayfly larvae good water pollution indicators? | They're sensitive to the concentration of dissolved oxygen in the water. |
What would a high amount of mayfly larvae in a river indicate? | The water is very clean. |
Which invertebrates would you expect to see in polluted water conditions? (2) | • Rat-tailed maggots
• Sludgeworms |
How do scientists use satellites to measure environmental change? | Measure temperature of the sea surface and snow and ice cover. |
How do scientists use automatic weather stations to measure environmental change? | Tell us the atmospheric temperature of a certain position very accurately. |
How do scientists use rain gauges to measure environmental change? | Measure rainfall to see any yearly changes in amount of rain. |
How do scientists use dissolved oxygen meters to measure environmental change? | Measure the concentration of dissolved oxygen in water to see if pollution levels are changing. |