Level 69
Level 70

Biosphere


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abiotic factor
Any nonliving part of the environment
biome
have a particular combination of average annual temperature and annual precipitation and contain distinctive plant growth forms that are adapted to that climate
biosphere
earth, air, and water woven into each, the spark of life
biotic factor
living organisms
community
a place where people live, work, and play
population
A group of individuals that belong to the same species and live in the same area
Species
A group of organisms that have a unique set of characterisitcs that distinguish them from all other organisms and, for organisms that reproduce sexually, can mate and produce fertile offspring. EX: all humans are mem…
chemosynthesis
when certain species of bacteria use the energy contained in bonds of methane and hydrogen sulfide, generate energy instead of by photosynthesis
absolute time scale
a time scale which measures dates and ages in units and times such as years or hundreds of thousands of years
herbivore
An organism that obtains energy by feeding on plant parts
heterotroph / consumer
A consumer that ingests or relies on other organisms for energy
omnivore
An animal that eats both plants and animals
photosynthesis
Process that uses light energy to power chemical reactions that convert carbon dioxide and water into oxygen and carbohydrates
scavenger
Animals that consume the carcasses of other animals that have been killed by predators or died of natural causes
biomass
The total amount of living tissue, usually measured in grams, within a given trophic level
Barriers
restricts, limits because of conditions; food, water, shelter, resources that will limit survival
coastal marsh:
have been severely damaged by canals cut by the oil industry.
cold front
colder air, heavy rain, thunderstorms, snow
phytoplankton
floating algae that live in the limnetic zone of of lakes and ponds
trophic level
Each step in the food chain or food web
zooplankton
Diverse group of small, swimming animals that feed on marine algae
limiting nutrient
The nutrient that is short in supply and thus puts limits on the productivity of an ecosystem
nitrogen fixation
The process by which bacteria convert nitrogen gas into ammonia
nutrient
A chemical substance that an organism needs to sustain life
Level 71