Across
- 3. is a silvery-gray, soft, malleable rare earth metal with atomic number 65
- 5. is burned create electricity
- 8. 600Bc was transported through bamboo pipelines
- 9. helps boost serotonin, a chemical in your brain that can give you more energy and help keep you calm, positive, and focused
- 10. is a fossil fuel primarily composed of methane, considered one of the cleanest burning fossil fuels
Down
- 1. filter water through soil and plants, providing clean drinking water to rivers and lakes.
- 2. provide clean air and wate, and act as natural filters to prevent pollution from entering the water system.
- 4. only 10 make up 95% of the worlds crust
- 6. helps by lowering the risk of heart disease, improving brain function, supporting bone health, and boosting the immune system
- 7. is used in rocket launches and space expeditions.