Across
- 4. a chemical element with the symbol Si
- 5. unidentified flying object
- 7. the study of Earth and the environment
- 9. the study of earthquakes
- 12. an organism that lives off another organism
Down
- 1. the natural science that studies matter
- 2. device we use to create and store data
- 3. the study of the past
- 6. the natural way to grow vegetables
- 8. the opposite of singular
- 10. a medical technique to see inside the body
- 11. the capital city of Norway