| A | B |
|---|
| consumer | an organism that obtains energy by feeding on organic matter |
| ecosystem | a community of living things along with their natural environment |
| equilibrium | a stable situation in which opposing forces are balanced |
| food chain | a sequence of organisms in which each organism feeds on the one below |
| population | all organisms of a certain kind within a defined region |
| predator | an animal that kills and eats other animals |
| prey | an animal that is killed and eaten by other animals |
| producer | an organism that converts simple inorganic matter into organic matter |
| photosynthesis | plants using the energy from the sun to create organic matter from carbon dioxide and water |
| organic materials | carbon-based compounds produced by living things |
