Across
- 4. Pigment needed for photosynthesis
- 6. Plant use it gain energy
- 8. Study of living things
- 9. The last planet in the solar system
Down
- 1. A dwarf planet
- 2. Organ which fishes use to breathe
- 3. Known as the 'Red Planet'
- 5. Nearest star to the sun
- 7. A famous scientist who wrote a lot about relativity