1
Q
Aquatic organisms
A
fish plankton, bacteria, and viruses
2
Q
dissolved oxygen
A
measurements give the level of oxygen present in water
3
Q
Biological Oxygen demand
A
measures how quickly oxygen is used up micro-organisms in a given of body of water
4
Q
fertilizer
A
water dissolves it provided nutrients to the plants
5
Q
Eutrophication
A
the addition of nutrients to an aquatic ecosystem increasing plant growth
6
Q
heavy metals
A
have a density of 5 g/ ml or higher ex - mercury
7
Q
bioccumulation
A
the gradual build up of a substance in an organisms body
8
Q
pesticides
A
chemicals that kill unwanted organisms
Biology grade 9
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