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the capacity to do work


anything that has mass and takes up space


the process in which plants use sunlight to produce sugar molcules


process in which chemical energy is used to produce carbohydrates


an organism that makes its own food


an organism that obtains energy by feeding on other organisms


any animal that feeds chiefly on grass and other plants


organism that obtains energy by eating both plants and animals


any animal that feeds on flesh


organism that breaks down the wastes or remains of other organisms

food chain

a community of organisms where each member is eaten in turn by another member

food web

a diagram that shows the feeding relationships between organisms in an ecosystem

energy pyramid

way of showing how energy moves through a food chain

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