Across
- 2. Current flow from positive to negative.
- 3. Same number of protons; different number of neutrons
- 5. Straight line through 0 0 (8 12)
- 6. How energy is released in stars
- 7. Splitting of atoms in a nuclear power station
- 8. Number of complete waves passing a point per second.
- 10. Type of resistor who’s resistance can be changed.
- 14. 13.8 Billion years is the age of the …
- 16. Energy cannot be created or destroyed; we say it is...
- 17. Part of the electromagnetic spectrum with longest wavelength.
- 18. Radiation around us all the time
- 19. A beta particle is a high speed ... from the nucleus
- 20. 100 000 light years is the diameter of the … (5 3)
- 21. Rate of transfer of energy or rate of doing work
- 22. Method of heat transfer in solids
- 24. Energy is transferred … when a force moves through a distance
- 27. Most energetic particles leave the surface of a liquid causing cooling.
- 28. Area under a velocity time graph
- 35. Region in which an electric charge experiences a force(8 5)
- 37. Useful energy output divided by total energy input
- 38. Helium nucleus
- 40. Transmitting electricity at a high voltage and low current reduces energy lost as …
- 43. A voltage is ... when a conductor moves through a magnetic field.
- 46. Wire which melts when too much current flows
- 48. electrical work done by a source in moving a unit charge around a complete circuit (13 5)
- 52. -273°C (8 4)
- 53. A danger of this type of radiation is damage to surface cells and eyes.
- 55. Neither conduction or convection can occur in a vacuum because it has no ...
- 56. Star that forms at the end of a large mass stars lifecycle.
- 57. Good insulators often contain pockets of ... (7 3)
- 58. Easily magnetised and demagnetised (4 4)
- 59. Field with parallel and evenly spaced field lines.
Down
- 1. Vibration of particles is parallel to the direction of propagation of the wave
- 2. Point through which all the weight of an object appears to act (6 2 7)
- 4. work done by a unit charge passing between two points in a circuit(9 10)
- 9. Change in speed and direction of wave when it travels from one medium into another.
- 11. 3×10⁸ is the speed of an … wave in a vacuum.
- 12. Range of human hearing is from ... Hz to 20 000Hz
- 13. Also produced by low mass stars when white dwarfs are formed.(9 7)
- 15. Energy stored in a moving object.
- 23. This occurs if the angle of incidence is greater than the critical angle. (5 8 10)
- 25. Maximum displacement of a particle (in a wave) from the rest position
- 26. Gravitational force on an object that has mass.
- 29. Commutator on a motor (5 4)
- 30. Current where electrons flow constantly changes direction
- 31. Time taken for half the nuclei of that isotope in any sample to decay
- 32. Only allows current to flow in one direction
- 33. Vibration of particles is perpendicular to the direction of propagation of the wave.
- 34. Method of heat transfer by electromagnetic waves
- 36. unpredictable
- 39. Theory that the Universe expanded from a single point of high density and temperature.
- 41. Gradient of a velocity time graph
- 42. Part of the electromagnetic spectrum with highest frequency.
- 44. Method of heat transfer in liquids and gases
- 45. Killing bacterial in food.
- 47. Force that opposes motion
- 49. Charge passing a point per unit time
- 50. Measure of the quantity of mass in an object
- 51. Quantity that has size and direction
- 54. Wire attached to the metal casing of an appliance.