Energy stored in chemical bonds and released through chemical reactions

The process by which one or more substances change to produce one or more different substances

A sugar composed of six carbon atoms that is the preferred energy source for most cells; produced by photosynthesis

The simplest unit of a chemical compound that can exist, formed when two or more atoms join together chemically

A chemical reaction during which plants convert radiant energy from the Sun to chemical energy; the reaction converts carbon dioxide and water into sugar (glucose) and oxygen

A substance produced during a chemical reaction

Energy from the Sun that reaches Earth as visible light, ultraviolet radiation, and infrared (heat) radiation

A substance that takes part in and undergoes change during a chemical reaction

An animal that eats other animals

An organism that must consume other organisms for nutrients

Organisms such as bacteria and fungi that break down the remains of dead plants and animals without need for internal digestion

A system comprising all the biotic and abiotic factors in an area and all the interactions among them

A diagram that shows the total amount of energy contained within each trophic level

A single, linear path showing the flow of energy from the Sun to a producer and through different levels of consumers

Overlapping food chains with different pathways to show the flow of energy in an ecosystem

An organism that consumes only plants

An organism that gets its energy by feeding on producers in the food chain

An organism that transforms energy from the Sun and uses carbon dioxide and water to make food

An animal that eats primary consumers (i.e., other animals that eat plants)

An organism that gets its energy by eating secondary consumers

The position an organism occupies on the food web