Across
- 3. - European nation
- 5. fission- nucleus splits spontaneously
- 6. - the scientific study of light and sound
- 8. in a secret way
- 9. the natural force
- 11. - a person who explains the natural world using scientific method
Down
- 1. a person who play the violin
- 2. - the story of person life written by somebody else
- 4. Einstein - name of the genius
- 7. bombs- a bomb whose violent explosive power
- 10. natural world using science.