chemicals in the environment Flashcards
What is nitrogen fixation?
changing free nitrogen so that it can form compounds that organisms can use.
What two process change free nitrogen into nitrogen fixation?
lightening, root nodules
What is pollution? give three examples
anything that is harmful to living things. Example: human activity, vehicle exhaust and forest fires
What is cellular respiration?
chemical reaction in your body cells, that utilize oxygen to create energy for your cells
What do the numbers on the fertilizer label indicate?
fertilizers have three elements - nitrogen, phosphorus and potassium.
Define Herbicide?
It gets rid of weeds
How to landfills prevent chemicals moving into the groundwater?
using plastic liners and compact clay
What pollutants are released from fossil fuel combustion?
carbon dioxide, sulfur dioxide, nitrogen oxides, mercury and lead.
Why do farmers use fertilizers
to keep their crops healthy and grow faster.
Why does sewage need to be treated?
to break down the organic materials before going into the soil
define neutral solution
The pH has to be 7, its neither an acid or base.
Define a effluent
Water the has been treated that was released into lake or rivers.
What are fossil fuels
They are natural gas, coal, and oil. Formed from dead plants and animals
what is an acid?
It has an pH from 0 - 6 and they tast sour.
what is a base
It has a pH from 8 - 14
