lesson 8 Flashcards

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1
Q

Aquatic organisms

A

fish plankton, bacteria, and viruses

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2
Q

dissolved oxygen

A

measurements give the level of oxygen present in water

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3
Q

Biological Oxygen demand

A

measures how quickly oxygen is used up micro-organisms in a given of body of water

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4
Q

fertilizer

A

water dissolves it provided nutrients to the plants

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5
Q

Eutrophication

A

the addition of nutrients to an aquatic ecosystem increasing plant growth

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6
Q

heavy metals

A

have a density of 5 g/ ml or higher ex - mercury

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7
Q

bioccumulation

A

the gradual build up of a substance in an organisms body

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8
Q

pesticides

A

chemicals that kill unwanted organisms

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