Across
- 2. A device used to identify plants and animals.
- 7. The cycle that explains the relationship between the different rock types.
- 8. The process where liquid turns to gas.
- 10. Living things that can create their own form of energy.
- 11. The layers of soil within the ground.
- 13. A living thing that eats other plants/animals to retrieve energy.
- 14. Being able to maintain a specific rate or level.
- 15. The cycle in which nitrogen is converted into several chemical forms.
Down
- 1. The continuous circulation of water in the atmosphere.
- 3. The process of how trade, technology, and services have connected the world.
- 4. A resource that can continually replenish causing an endless supply.
- 5. The balance of humans and other living things.
- 6. A scientific procedure consisting of observations and data to test a hypothesis.
- 9. Hail, sleet, rain, or snow that falls from the clouds.
- 12. A group of people that live together in one place or have the same interests.