| A | B |
|---|
| food web | the overlapping food chains that link producers, consumers and decomposers in an ecosystem |
| CO2 | carbon dioxide |
| oxygen-carbon dioxide cycle | plants use cd and produce oxygen; living things use oxygen and produce cd |
| nitrogen cycle | nitrogen gas is used by living things then returned to atmosphere |
| protein | forms the structure and controls the processes in living things |
| cell respiration | the process of using oxygen to release energy from food |
| water cycle | process where water moves between the atmosphere and the earth |
| transpiration | process in which a plant releases moisture through the stomata |
| photosynthesis | process by which plans make their food by using energy from the sun |
