Across
- 3. heaviest planet in our solar system (7)
- 6. proposed the Plum Pudding model for the atom (7)
- 9. groups of stars that look like shapes in the sky with given names (14)
- 11. a large collection solar systems, held together by gravity (6)
- 12. property of the nucleus that decreases during alpha decay (4)
- 13. remains the same anywhere in the universe (4)
- 14. property of the nucleus that decreases during alpha decay (6)
- 15. property of a material with the units Ohm meter (11)
- 19. increases when work is done on a gas (11)
- 20. an example of a contact force (8)
- 21. an example of a non-contact force (13)
- 24. lightest planet in our solar system (7)
Down
- 1. an example of a non-contact force (13)
- 2. colliding small nuclei to join them together (6)
- 4. part of the EM spectrum used for television broadcasting (5)
- 5. type of lens that always creates virtual images (7)
- 7. luminous spheres of plasma held together by their own gravity (5)
- 8. a secondary colour of light (7)
- 10. the S in NASA (5)
- 12. an example of a non-contact force (8)
- 16. conducted the alpha scattering experiment (10)
- 17. a primary colour of light (3)
- 18. the nearest major galaxy to us (9)
- 22. an example of a contact force (7)
- 23. radiation type that can only be stopped by several metres of concrete (5)