Across
- 3. invention of single- wire telegraph system
- 5. Chemist known for the periodic law and table.
- 6. made significant contributions to the study of light scattering.
- 7. developed the laws of motion and universal gravitation.
Down
- 1. Theoretical physicist known for the theory of relativity
- 2. theory of evolution by natural selection
- 4. discovered of polonium and radium.