Across
- 4. fine dry powder
- 5. gases that surround the planet
- 9. evidence or facts
- 10. something that orbits earth
- 11. something that is needed
- 12. empty
- 14. a part or feature of something
Down
- 1. expert in astronomy
- 2. very large
- 3. discover or find
- 4. temperature or angle
- 5. to progress or move forward
- 6. visible features of land
- 7. to think about something
- 8. basics or core
- 13. a tool used in a task