Across
- 3. The movement of water through the Earth's oceans, rivers, lakes, and atmosphere
- 4. The element that is a primary component of the Earth's atmosphere, but also a vital part of living organisms
- 5. The gas essential for plant photosynthesis and found in Earth's atmosphere
- 7. The process where plants use sunlight to synthesize foods from carbon dioxide and water
- 8. The layer of gases surrounding the Earth
- 9. cycle A cycle that focuses on how nitrogen is converted into different chemical forms in the environment
Down
- 1. cycle A cycle that describes how water moves through Earth's atmosphere, surface, and ground
- 2. The process by which plants absorb carbon dioxide and release oxygen
- 6. cycle The cycle in which phosphorus moves through the environment, focusing mainly on the soil and water