Physics End of Year 10

1234567891011121314151617181920212223242526272829
Across
  1. 4. a decrease in velocity over time
  2. 6. the rate of change of velocity
  3. 8. a high-speed electron emitted from a nucleus
  4. 9. a force that opposes motion between two surfaces
  5. 10. material used to block or reduce radiation
  6. 11. the process by which an unstable nucleus becomes more stable
  7. 12. the tendency of an object to resist a change in motion
  8. 14. the splitting of a large atomic nucleus to release energy
  9. 15. the unit of force
  10. 16. the small, dense centre of an atom
  11. 18. natural radiation from sources like rocks and cosmic rays
  12. 21. the time taken for half of the radioactive nuclei to decay
  13. 22. forces that cause a change in motion
  14. 23. the ability of radiation to remove electrons from atoms
  15. 26. a type of counter used to detect radiation
  16. 28. energy or particles emitted from unstable nuclei
  17. 29. a single force that has the same effect as all the forces acting together
Down
  1. 1. speed in a given direction
  2. 2. an electromagnetic wave emitted from a nucleus
  3. 3. forces that are equal in size and opposite in direction
  4. 5. exposure to radiation without becoming radioactive
  5. 7. the amount of matter in an object
  6. 12. a pair of equal and opposite forces acting on two different objects
  7. 13. the product of mass and velocity
  8. 17. unwanted radioactive material on surfaces or inside objects
  9. 19. how far an object moves, regardless of direction
  10. 20. a particle made of 2 protons and 2 neutrons
  11. 24. atoms with the same number of protons but different numbers of neutrons
  12. 25. the constant speed reached when the weight is balanced by air resistance
  13. 27. the force that attracts objects towards the centre of the Earth