| Word | Definition |
| Carbon Cycle | The process by which carbon cycles between the atmosphere, oceans, and living organisms; includes the process of photosynthesis |
| Carbon Dioxide | A gas in the atmosphere that plants take in and use in the process of making their own food |
| Cycle | A sequence of events that reoccur over and over |
| Fertilizer | A mixture which is spread on or worked into soil to increase its nutrients and supports plant growth |
| Global | Pertaining to the whole world; universal |
| Nitrogen Cycle | The process by which nitrogen cycles between the atmosphere, soil, plants, and animals |
| Nitrogen | The most abundant gas in the atmosphere; 78% of the atmosphere |
| Oxygen | A gas in the atmosphere that animals breathe in and need to survive |
| Solar Energy | Energy that comes from the Sun |
| Waste | Undigested food; poop |
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Spanish 3
