2.0 chemical in the environment Flashcards
What is the ozone layer.
It protects the Earth from UV rays.
How do the biological indicators tell us the quality of water?
When there is not enough oxygen in the water it decreases the amount of insects in the water.
what does parts per million(ppm)?
the concentration in the environment.
What affects the levels of dissolved oxygen in water
Turbulence, photosynthesis, temperature, and organisms using oxygen.
How does phosphors and nitrogen enter the water systems?
sewage outfall and runoff from fertilized fields.
Define spring acid shock
Acid snow starts to melt lowering the pH.
What are heavy metals
They have an high density such as nickel and lead.
What is LD50?
LD stands from lethal dose. 50 mean that 50% of the population will die.
Sulfur dioxide can lead to…
smog and acid rain.
