Across
- 4. the study of matter and its interactions with other matter and energy.
- 6. "Solar system" in French
- 7. "metals" in French
- 8. "Earth" in French
- 9. a clean alternative to methane, also known as natural gas.
- 10. gas that we breath in
Down
- 1. The most reactive metal with water
- 2. we see bacteria through it
- 3. "Energy" in French
- 5. a huge glowing ball of hot gas, mainly hydrogen and helium.