Greenhouse Effect
The process in which chemicals get into water and disperse through the environment.
What is leaching?
The dose of chemical required to kill 50% of a population.
What is LD50
You conduct an investigation of the river water quality by taking a water sample and testing for fluoride, a potentially toxic chemical in large doses. An 2 L sample of river water contains 60 mg of fluoride. Calculate the concentration of fluoride in ppm.
What is 30 ppm
Which of the following do NOT play a role in fixing nitrogen?
What is water?