1. Abiotic: non-living

2. Biotic: living

3. Carrying Capacity: the maximum population an ecosystem can support of a given species.

4. Competition: for food and resources
Competition: for food and resources. Types: interference (by direct attack), exploitation (forced to share a resource), scramble (everyone gets something), contest (one competitor gets it all), and restrictive (preventing someone else from getting it).

5. Exponential Growth: Increase in number or size, at a constantly growing rate.

6. Limiting Factors : Any factor (biotic or abiotic) that inhibits the growth of a species population.

7. Logistic  population growth: occurs when the growth  rate decreases as the population reaches carrying capacity. Carrying capacity is the maximum number of individuals in a population that the environment can support.

8.   Overpopulation: occurs when a population of a species exceeds the carrying capacity of its ecological niche. 

9. Population: Organisms inhabiting a territory.

10. Scale: Levels of organization between organisms in the biosphere.

11. Biodiversity:
Diversity among and within plant and animal species in an environment.
Note: The preservation of biodiversity is considered by environmentalists to be a major goal of environmental policy.

12. Ecological Diversity:
 Is a type of biodiversity. It is the variation in the ecosystems found in a region or the variation in ecosystems over the whole planet.

13. Habitat:
The natural environment of an organism; place that is natural for the life and growth of an organism.

14. Niche:
The position or function of an organism in a community of plants and animals.

15. POPULATION distribution:
The arrangement or spread of organisms living in a given area; also, how the population of an area is arranged according to variables.

16. POPULATION DENSITY:
The number of organisms living per unit of an area (e.g. per square mile); the number of organisms relative to the space occupied by them

17. Resource Partitioning:
So, when species divide a niche to avoid competition for resources, it is called resource partitioning. Sometimes the competition is between species (interspecific competition) and sometimes it's between individuals of the same species (intraspecific competition).

18. Species Richness:
Species richness is simply the number of species present in a sample, community, or taxonomic group. Species richness is one component of the concept of species diversity, which also incorporates evenness, that is, the relative abundance of species.