| A | B |
|---|
| chemical tests | tests water at a specific moment in time |
| biological tests | tests water over a long period of time |
| chlorine | used by humans to kill bacteria in water |
| bioindicators | animals and plants that are sensitive to changes in their environment |
| detective | what you are right now in science class |
| pH scale | determines whether a solution is an acid or a base |
| daphnia | microscopic animals that are bioindicators |
| acid rain | precipitation that is more acidic than normal |
| nitric acid rain | caused by nitrogen oxides in the air, mostly from cars and trucks |
| sulfuric acid rain | acid rain caused mostly from coal burning power plants that make electricity |
| crash | sharp decline in population |
| boom | sharp increase in population |
| bioaccumulation | chemical buildup in animal bodies |
| algal bloom | when algae increases drastically, eventually causing a low oxygen level in water |
| phosphates | comes from detergents and fertilizers |
| acid | substance with a pH of 0 to 6 |
| base | subtance with a pH of 8 to 14 |
| neutral | substance with a pH of 7 |
| erosion | wearing away of sediment |
| sediment | tiny particles of rock, dirt, and sand |
| turbidity | the amount of sediment in water |
| population | members of one species in a given area |
| population density | the number of individuals of one species in a specific area |
| community | many populations together |
| immigration | an individual or group moving INTO an population |
| emmigration | an individual or group LEAVING a population |
| producer | can make its own food |
| consumer | cannot make its own food, must rely of getting food elsewhere |
| limiting factor | a factor that prevents a population from increasing |
| carrying capacity | the largest population that an area can support |
| overpopulation | result of a lack of limiting factors |
| predator | the organism that does the killing in the predatory relationship |
| prey | an organism that is killed in the predatory relationship |
| birth rate | the amount of births in a population in a certain amount of time |
| death rate | the number of deaths in a population in a certain time |
