Unit 4 Flashcards
(26 cards)
T or f the organisms that use a water source determine if the water quality is good
True
What are 4 chemical tests that you assessed during the water quality lab
Dissolved oxygen, ph, nitrate, and phosphate
What might be the source of nitrates and phosphate in a pond or river
Run off
Why is high dissolved oxygen good for a pond or lake
All organisms need oxygen
Nitrates , phosphates and dissolved oxygen are measured in
Ppm
What does ppm stand for?
Parts per million
What does ph test for
How acidic or basic water is
What is a good ph for water
7
What color appeared if the ph sample was 7
Green
T or f all natural surface water water sources will have bacteria
True
T or f it is ok for drinking water to test positive for coliform bacteria
False
What does macro invertebrate mean?
Large, with no backbone
Why do macro invertebrates make good indicators of water quality
Easy to collect, very sensitive to changes in water quality
Where is the Cahaba located
Central Alabama
Where does the cahaba end?
Dallas county; bell Selma. It enters the Alabama river
What three factors make the Cahaba unique?
Longest free flowing river in the state, more fish per mile than any other river in North America, and it has its own endangered species
According to scientists, where did life originate
Water
Alabama is the ________ state
River
What is non-source pollution?
Pollution from many sources
What is siltation? Why is it so harmful to a stream or river?
It is small sediments. It chokes the river
Why is water called the universal solvent
It can dissolve most substances
What is a watershed?
Where rivers and other bodies of water drain to
What type of environment in the watershed is best For the river’s water quality
Forest
How do scientists determine water quality
Chemical analysis and macro invertebrates
