Physics Crossword 5

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Across
  1. 3. Newton’s ____ law: an object’s motion will stay the same unless a resultant force acts on it (5)
  2. 4. an alpha particle is the same as the nucleus of this element (6)
  3. 6. the current in an appliance normally flows through the ____ wire (7)
  4. 8. the ____ nuclear force is 100 trillion trillion trillion times stronger than gravity (6)
  5. 10. matter which has its properties (such as charge) reversed (10)
  6. 16. prefix shown with the letter m (5)
  7. 18. ____ radiation has enough energy to remove electrons from atoms (8)
  8. 21. SI base unit named after a French physicist (6)
  9. 22. the number of leptons in the Standard Model (3)
  10. 24. one of the colours of the earth wire (5)
  11. 25. the E in LASER (8)
  12. 28. a type of cancer treatment which uses ionising radiation (12)
  13. 29. the colour of the live wire (5)
  14. 30. planet covered in iron(III) oxide dust (4)
  15. 31. a semiconducting device that can emit light (3)
  16. 32. the only known astronomical object to harbour life (5)
Down
  1. 1. alternating current is constantly changing ____ (9)
  2. 2. a day on this planet is longer than a year on it (5)
  3. 5. a force that opposes an object’s motion (8)
  4. 7. measures the potential difference between 2 points (9)
  5. 9. a planet with a similar surface gravity to Mars (7)
  6. 11. the turning effect of a force (6)
  7. 12. the number of types of quarks (3)
  8. 13. natural satellites which orbit planets (5)
  9. 14. the resistance of a ____ resistor can be changed (8)
  10. 15. the resultant colour after mixing red and green light (6)
  11. 17. a different form of the same element (7)
  12. 19. a machine that converts mechanical energy to electrical energy (9)
  13. 20. nuclear ____ is when 2 nuclei join to create a heavier nucleus (6)
  14. 23. they are used to transmit the rotational effect of a force (5)
  15. 26. a cloud of dust and gas in space (6)
  16. 27. the lightest of all the quark flavours (2)