Across
- 3. Gas used in balloons
- 5. Process of conversion of liquid into vapour
- 6. Scientist who discovered the nucleus of the atom
- 8. Metal used in thermometers
- 9. Organ where photosynthesis occurs
Down
- 1. Unit of pressure
- 2. Device used to measure temperature
- 4. Scientist who discovered gravity
- 6. Radiation with the longest wavelength
- 7. Gas released during photosynthesis