Across
- 2. A process that releases carbon dioxide while releasing energy from food
- 6. A substance that organisms need for growth and survival
- 7. An organism that returns nutrients to the environment by breaking down dead matter
- 8. The movement of carbon through organisms air water and soil
- 9. A model showing how energy and matter move among organisms
Down
- 1. A process that removes carbon dioxide from the atmosphere
- 3. The movement of nitrogen through the atmosphere soil and living things
- 4. Anything that has mass and takes up space
- 5. The continuous movement of water through Earth and its atmosphere