Science & Space Crossword — 28 October 2026

Across

1. 2. Atoms with the same number of protons but different neutrons. (8)
2. 7. Dwarf planet once considered the ninth in the Solar System. (5)
3. 9. Describing an event causing widespread destruction in space. (12)
4. 11. Effect that explains the change in frequency of waves based on motion (7)
5. 12. Describing an atom with an unequal number of protons and electrons. (7)
6. 13. Subatomic particle with no charge, often linked to fusion. (8)

Down

1. 1. Pathway through which electric current flows. (7)
2. 3. Study of body functions and processes in living organisms. (10)
3. 4. Fundamental unit of matter in physics (8)
4. 5. Visible light's range of colours seen in a prism (7)
5. 6. Charged particles important in electricity and chemistry. (4)
6. 8. Inoculation to boost immunity against diseases (7)
7. 10. Lightest noble gas, commonly used in balloons (6)