Across
- 3. energy,force
- 8. exercise carried out by scientists
- 9. carbon monoxide
- 10. A set of connected things or parts forming a complex whole
- 11. Used as an Internet search engine
- 12. a contractile form of tissue which animal use to effect movement
- 14. the address of a World Wide Web page
Down
- 1. without it things remain theories
- 2. a symbol in an alphabet
- 4. man of steel
- 5. a unit of elect5rical resistance
- 6. a sanction of an item;approbation
- 7. A robot with a human appearance
- 9. smallest unit of living matter
- 12. 5280 feet
- 13. source of salt