biology terms
1.Logistic growth- when a population of organisms grows at a steady pace until it reaches its carrying capacity, then it levels off. (graph with an s-curve)
2.Exponential growth- when a population of organisms grows very rapidly because it has unlimited resources ( graph with a j-curve)
3.Stewardship- when people take responsibility for their environment and do things to minimize the negative impact humans have on the environment- like a protector for the environment.
4.Sustainable practices- using energy sources that are renewable and that don’t harm the environment. (wind power, hydroelectric power and solar power are examples of sustainable practices).
5.Invasive species- organisms that currently live in an area they are not naturally found, they do not have any natural predators and can grow out of control- they usually take over the habitat of another organism that is normally found in the area. (examples are: fire ants, kudzu, rabbits in Australia, the cane toad, northern snakehead)
6.Bioaccumulation- a build up of toxins in the tissue of an organism, top predators are most affected.
7.Acid rain= http://www.epa.gov/acidrain/education/site_students/whatisacid.html sulfur dioxide and nitrogen oxides mix together to turn rain acidic- tree tops in the mountains look as if they have been burned
8.Greenhouse effect- when Ultraviolet (UV) rays get stuck inside Earth’s atmosphere because a thicker shell of atmospheric gases has accumulated in the atmosphere due to pollution.
9.Climate change- when the patterns of temperature and weather change over a large area due to the “greenhouse effect”
10.Deforestation- when a large wooded area is cleared, either by “clear cutting” or burning, this results in greater amounts of carbon dioxide accumulation in the atmosphere.
