underground bed or layer yielding ground water for wells and springs etc
fresh water found underground
law of conservation of matter
states that matter is never created or destroyed, it just changes form.
any substance that can be metabolized by an organism to give energy and build tissue
the cycle of nutrients like carbon, oxygen, phosphorus and nitrogen through the earth
plants that are edible by animals.
synthesis of compounds with the aid of radiant energy (especially in plants)
synthesis of carbohydrate from carbon dioxide and water
an animal that eats plants.
the process of getting energy from nutrients.
something that eats meat, and ONLY meat.
something that eats both meat and plants. most omnivores eat more meat than plants.
something that breaks down dead things
Biomass is biological material derived from living, or recently living organisms
A food web/chain is a linear consequence of links in a food web starting from a species that eats no other species in the web and ends at a species that is eaten
same as food chain really
A keystone species is a species that has a disproportionately large effect on its environment relative to its abundance.
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