Details Title: 2.2 vocab Description: Glencoe Science Biology textbook, Flordia Edition, National Geographic Total Flash Cards: 7 Created: 09/09/2009 19:59:31		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Science Flashcards
Cards in this set: Term autotroph Definition organism that uses energy from the sun or energy stored in chemical compounds to manufacture their own nutrients Term biomass Definition the total mass or weight of all living matter in a given area Term decomposers Definition organisms, such as fungi and bacteria, that break down and absorb nutrients from dead organisms Term food chain Definition simple model that shows how matter and energy move through an ecosystem Term food web Definition simple model that shows all the possible feeding relationships at each trophic level in a community Term heterotrophs Definition organisms that cannot make their own food and must feed on other organisms for energy and nutrients Term trophic level Definition organism that represents a feeding step in the movement of energy and materials through an ecosystem