Topic 3- Pollution Indicators Flashcards
0
Q
How are streams and rivers polluted?
A
1) chemicals from factories can leak into nearby water sources
2) heated water from factories leak into water sources. This boosts bacteria growth
3) acid rain can pollute fresh water
1
Q
What is eutrophication?
A
Sewage and fertilisers that wash through soil by rainfall leaking into streams and rivers
2
Q
Why is the pH of the water significant?
A
Living organisms can only survive at a narrow range of pH levels
3
Q
What is the name of species that enables us to identify pollution levels?
A
Indicator species
4
Q
What are the 3 ways scientists assess pollution?
A
Scientists check oxygen levels
Tests pH
Mathematical models to predict future effects
