Across
- 3. quark character can only change in the ____ interaction (4)
- 6. reflected sound waves (6)
- 7. the positive nucleon (6)
- 9. the total charge of an atom (4)
- 11. all electromagnetic waves travel at the same ____ (5)
- 12. ____ velocity: the maximum speed of a falling object – its weight and frictional forces are balanced (8)
- 14. ____ waves can be used for medical imaging (10)
- 15. opposite charges ____ (7)
- 16. he was the first to propose that stars were destined to collapse at the end of their lives (13)
- 17. larger planets in our solar system are primarily made of ____ (3)
- 18. this wire could give you an electric shock (4)
- 20. Newton’s ____ law: when 2 objects interact, they exert equal and opposite forces on each other (5)
- 22. ____ production: a photon is converted into an equal amount of matter and antimatter (4)
- 23. they are generally less dense than solids (5)
- 24. the strength of a magnet is directly proportional to the ____ from the magnet (8)
- 25. the smallest planet in our solar system (7)
- 26. type of wave produced by earthquakes (7)
- 29. the hand you use to do Fleming’s rule (4)
- 30. light appears ____ shifted from galaxies which are moving away from Earth (3)
Down
- 1. the material that slows down the neutrons during nuclear fission so that they are more likely to be absorbed into a nearby fuel rod (8)
- 2. one of the colours of the earth wire (6)
- 4. one of the A’s in NASA (11)
- 5. the sun is orbited by ____ planets (5)
- 8. all waves can be ____ (9)
- 10. our current model of the solar system is ____ (12)
- 13. the universe is ____ (9)
- 19. voltmeters are connected in ____ (8)
- 21. a main ____ star is in a long period of stability (8)
- 27. the rovers Curiosity and Perseverance were sent to study this planet (4)
- 28. a type of lens (6)