Across
- 3. one hydrogen reaction using Li (Lithium)and sulfuric acid
- 5. Who invented the first mobile phone?
- 6. Who invented the first car?
- 7. Who invented the first plane that could fly?
Down
- 1. What was the first tank named?
- 2. WHo invented teh first computer?
- 4. Who was the first cosmonaut?