Across
- 2. an absence of any particles is called a………….
- 7. the image produced by an infrared camera is called a……….
- 9. the type of energy produced by a generator
- 10. a wave that oscillates at right angles to the direction in which the energy is being transferred
- 17. a device to measure temperature
- 19. an object will cool quickly if there is a large temperature ……………..with it and the surroundings
- 20. the unit of frequency
- 21. a wave that oscillates parallel to the direction in which the energy is being transferred
- 22. the unit of energy
- 26. a word to describe the movement of particles in a wave
- 27. a device to measure angles with
- 31. the time for one complete wave is called the ………….
- 36. the unit of speed
- 38. how heat travels through liquids and gases
- 41. what heat radiation is
- 42. the type of energy gained by lifting an object
- 44. energy that is of a non-useful type
- 45. a unit of temperature used in America
- 46. the type of energy transferred from a hot region to a cold region
- 47. to prevent conduction you can use…………………..
- 49. another way of saying “energy transferred”
- 50. the coldest possible temperature
- 52. a type of simple machine
- 54. stretching a spring will store this kind of energy
- 55. what a material must be for light to travel through it
- 61. when energy changes from one type to another we say it is………………….
- 62. friction will transfer this type of energy
- 64. how fast a wave travels is its …………
- 65. the word for when light changes speed and/or direction
- 67. how heat travels through solids
Down
- 1. another word for pivot
- 3. the type of energy stored in fuels
- 4. a scientific unit of temperature
- 5. the distance between one identical point on a wave and the next is called the…………
- 6. the colour that is the best emitter of heat radiation
- 8. the midpoint on a seesaw
- 11. the energy released by “splitting the atom”
- 12. a measure of how hot something is
- 13. the opposite of emit is……..
- 14. how much useful energy is transferred compared to total energy used
- 15. another word for turning force
- 16. what metals have that makes them good conductors
- 18. the distance between the rest position and a peak on a wave is called the………
- 23. the type of energy that a solar cell converts to electricity
- 24. the type of energy produced by a loudspeaker
- 25. these windows have a layer of trapped air in them
- 28. these can be used to help insulate a house
- 29. means at right angles
- 30. the type of energy gained by molecules if they get hotter
- 32. the name of the light ray going into something is called the ……………. ray
- 33. the scientific name for the material light travels through
- 34. what atoms in a solid can do
- 35. the property of a material that slows light down
- 37. how heat can travel through the vacuum of space
- 39. the colour that is the worst emitter of heat radiation
- 40. energy that is not wasted is…….
- 43. the law of conservation of energy says energy cannot be created or………….
- 48. increasing this will mean evaporation can happen faster
- 51. solid, liquid and gas are the …………….. of matter
- 53. a type of simple machine
- 54. when molecules leave the surface of a liquid this is called……..
- 56. what is the unit of power?
- 57. a dashed line drawn at right angles
- 58. the number of waves per second
- 59. a common unit of temperature
- 60. the rate at which work is done
- 63. the opposite of absorb is……..
- 66. a piece of apparatus that produces a beam of light