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what is an ecosystem?
all organisms in a given location or area
what is the meaning of "inanimate"?
non-living
what is a producer?
an organism that makes its own food
what is an autotroph?
a producer (makes its own food)
what is photosynthesis?
the process of using sunlight to trigger chemical reactions which turn CO2 into food
what is a consumer?
an organism that must eat other organisms for food
what is a heterotroph?
a consumer (needs to eat other organisms)
what is an herbivore?
an organism which eats only plants
what is a carnivore?
an organism which eats only meat
what is an omnivore?
an organism which eats anything
what is a decomposer?
an organism which breaks down organic matter (detritus) into simpler forms
what is a food chain?
a sequence of what eats what
what is a food web?
a complex system of food chains
what is a trophic level?
a step of a food web
what is an energy pyramid?
a chart which shows how energy is passed up the food chain
what is a nutrient?
any chemical substance necessary for life
what is succession?
a series of predictable changes in an ecosystem