Ecosystems and populations
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| 8243181317 | ecology | The study of how organisms interact with each other and their environment | 0 | |
| 8243181318 | species | group of organisms that interbreed and produce fertile offspring | 1 | |
| 8243181319 | population | members of a species that live in the same area | 2 | |
| 8243181320 | community | all populations in a specific area | 3 | |
| 8243181321 | ecosystem | all living things and their physical environment living in a specific area | 4 | |
| 8243181322 | Biosphere | All parts of planet Earth that host life, with all of its organisms and environments | 5 | |
| 8243181323 | biotic factor | Part of an ecosystem that is living or used to be living | 6 | |
| 8243181324 | abiotic factor | part of the ecosystem that has never been alive | 7 | |
| 8243181325 | habitat | place where an organism lives | 8 | |
| 8243181326 | resource | anything an organism needs to survive | 9 | |
| 8243181327 | population size | The number of individual organisms in a given population at a given time | 10 | |
| 8243181328 | population density | The number of individuals within a population per unit area | 11 | |
| 8243181329 | population distribution | How organisms are arranged within an area | 12 | |
| 8243181330 | age structure | The numbers of organisms of each age within a population | 13 | |
| 8243181331 | age structure diagram | A visual tool used to show the age structure of populations | 14 | |
| 8243181332 | sex ratio | A population's proportion of males to females | 15 | |
| 8243181333 | survivorship curve | Graph that shows how the likelihood of death varies with age | 16 | |
| 8243181334 | immigration | The arrival of individuals from outside a given area | 17 | |
| 8243181335 | emigration | The departure of individuals from a given area | 18 | |
| 8243181336 | migration | A seasonal movement into and out of an area | 19 | |
| 8243181337 | exponential growth | When a population increases by a fixed percentage each year | 20 | |
| 8243181338 | limiting factor | A characteristic of the environment that limits population growth | 21 | |
| 8243181339 | carrying capacity | The largest population size a given environment can sustainably support | 22 | |
| 8243181340 | logistic growth | How a population's initial exponential increase is slowed and finally stopped by limiting factors |  | 23 |
| 8243181341 | density dependent factor | A limiting factor whose influence changes with the population density | 24 | |
| 8243181342 | density independent factor | A limiting factor whose influence is unaffected by population density | 25 | |
| 8243181343 | biotic potentaial | The maximum ability to produce offspring in ideal conditions | 26 | |
| 8243374544 | What is a population growth rate dependent on? | birth rate, death rate, immigration, emigration | 27 | |
| 8243416551 | What are the levels of organization that ecologists study? | individuals, populations, community, ecosystems, biosphere | 28 | |
| 8243430441 | What is one way to monitor the overall health of a population? | Tracking how its size changes | 29 | |
| 8243452722 | What are three ways that populations can be distributed? | random, uniform, clumped | 30 | |
| 8243478447 | What two things can regulate a populations growth? | limiting factors and biotic potential | 31 | |
| 8243505386 | What are two ways that populations can grow? | Exponentially and logistically | 32 | |
| 8243531478 | When populations are clumped, what are the clumped around? | The resources they need for survival. | 33 | |
| 8243541065 | Where is the population more dense? NYC or Pen Argyl, PA | NYC | 34 |
