| A | B |
|---|
| population density | # of individuals per unit area |
| immigration | movement into an area |
| emigration | movement out of an area |
| exponential growth | individuals reproduce at a constant rate producing a j-shaped curve |
| logistic growth | population's growth slows or stops producing an s-shaped curve |
| carrying capacity | largest # of individuals that an environment can support |
| limiting factor | causes population growth to decrease |
| renewable resource | can regenerate quickly and is replaceable |
| nonrenewable resource | cannot be replenished through natural processes |
| soil erosion | wearing away by water and wind |
| deforestation | loss of forests |
| smog | mixture of chemicals that occurs as a gray-brown haze in the atmosphere |
| acid rain | contains nitric and sulfuric compounds with water vapor in the air |
| biodiversity | sum total of the genetically based variety of organisms in a biosphere |
| conservation | wise management of natural resources |
