Levels of Organization
Niche and Interactions
Biotic and Abiotic Factors
Energy Flow
Biogeochemical Cycles & Climate Factors
100
It is the basic unit of interaction with the environment and corresponds to an individual of a species
organism (or individual)
100
Defined as the function or particular role that a species plays within an ecosystem
Ecological niche
100
Name assigned to the living components of an ecosystem that interact based on their food source
biotic factors
100
Primary source from which most of the energy sustaining ecosystems originates
Sun
100
Natural processes through which essential elements circulate between living organisms and the environment
biogeochemical cycles
200
A group of organisms of the same species interacting with each other in the same geographic area
population
200
Set of relationships established among individuals to survive and reproduce
Ecological interactions
200
Non-living components of the environment that influence organisms and the flow of matter
abiotic factors
200
Level of the food pyramid located at the base that supports consumers
producers
200
The two main phases into which the carbon cycle is divided
Biological cycle and geological cycle
300
A set of populations of different species coexisting and interacting in the same area
community
300
Type of interactions or relationships occurring between organisms of the same species
Intraspecific relationships 
300
Organisms of the biotic group capable of producing their own food through photosynthesis
producers
300
Primary reason why available energy decreases as you move up the pyramid of trophic levels
Loss of energy as heat and respiration
300
Difference between climate and weather
Weather is the state of the atmosphere at a specific time and place, whereas climate is the pattern or average of weather observed in a region over a long period (usually 30 years or more)
400
Level of organization formed by several similar ecosystems sharing characteristic climate, flora, and fauna
biome
400
The two main biological goals that populations seek to achieve through their interactions to subsist
To survive and reproduce
400
Specific position or category occupied by an organism within a food chain or food web
trophic level
400
Organisms that recycle matter from all levels and receive energy arrows from both consumers and producers equally
Decomposers
400
Measuring instrument used to determine atmospheric pressure in units such as mmHg, atm, or kPa
barometer
500
Highest level of ecological organization that includes all regions of the planet where life exists
biosphere
500
Interaction in which one species lives at the expense of another, benefiting itself while harming the host (+, -)
parasitism
500
Complex and interconnected diagram demonstrating how living things share multiple trophic levels according to their diet
food web (or trophic web)
500
This pyramid decreases at each level due to loss in the form of heat, respiration, and other biological processes
energy pyramid
500
Three of the geographic climate factors that determine the climate of an area
latitude, altitude, relief, distance to the sea, or ocean currents