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100
Abiotic factors
nonliving aspects of the enviornment
100
detritivore
consume detritus
100
habitat
What is physical enviornment in which species live
100
sunlight or chemical compound
What is energy eneters ecosystem in the form of
100
lake
A what could be considered an ecosystem
200
Biomass
Total mass of organisms at a trophic level
200
detritus
dead leaves, animal faces, and other organic debris that collects on the soil
200
food and obtained
What are two important aspects of a species niche___ and how the food is _____
200
single
What is a food chain represents a pathway through which energy and matter flow through an ecosystem
200
Saprotrophs
What is the final step of decomposition
300
Carnivore
Consumes animals
300
Biotic factors
living aspects of the enviornment
300
diagrams
What is food chains and food webs that represent feeding relationships
300
herbivores
What is producers such as plants or algae
300
obligate carnivores
What is carnivores that can digest plants but do not commonly eat them
400
Chemoautrophs
uses energy from chemical compounds to make food
400
78
Nitrogen makes up what percent of the earths atmosphere
400
energy
What is passed up a food chain or food web to higher trophic levels
400
nitrogen fixation
What is the process of changing nitrogen gas to nitrates
500
Competitive exclusion principle
A given habitat may contain many differnet niche. cannot occupy the same place for very long
500
exchange pool
What is part of a cycle that holds an element or water for a short period of time
500
runoff
What is precipitation that falls on land may flow over the surface of the ground