Topic 6 - 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 booths bacteria growth.
3) acid rain can pollute fresh water.
1
Q
What is eutrophication?
A
Sewage and fertilisers that wash thought soil by rainfall leaking into streams and rivers.
2
Q
Why is pH of the water significant?
A
Living organisms can only survive at a narrow pH levels.
3
Q
What is the name of species that enables us to identify pollution levels?
A
Indicator species.
4
Q
What are 3 ways scientists assess pollution?
A
Scientists check oxygen levels.
Tests pH.
Mathematical models to predict future effects.
