Physics Crossword 7

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